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#1 2018-01-08 12:33:06

wilbertliu
Member
Registered: 2018-01-08
Posts: 10

[SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Hello,

As the title said, I can receive email on Apple Mail client, but having problem with sending.
Could you please help? I've been stuck for almost a week here.. ?

Here's my postconf :

2bounce_notice_recipient = postmaster
access_map_defer_code = 450
access_map_reject_code = 554
address_verify_cache_cleanup_interval = 12h
address_verify_default_transport = $default_transport
address_verify_local_transport = $local_transport
address_verify_map = btree:$data_directory/verify_cache
address_verify_negative_cache = yes
address_verify_negative_expire_time = 3d
address_verify_negative_refresh_time = 3h
address_verify_pending_request_limit = 5000
address_verify_poll_count = ${stress?{1}:{3}}
address_verify_poll_delay = 3s
address_verify_positive_expire_time = 31d
address_verify_positive_refresh_time = 7d
address_verify_relay_transport = $relay_transport
address_verify_relayhost = $relayhost
address_verify_sender = $double_bounce_sender
address_verify_sender_dependent_default_transport_maps = $sender_dependent_default_transport_maps
address_verify_sender_dependent_relayhost_maps = $sender_dependent_relayhost_maps
address_verify_sender_ttl = 0s
address_verify_service_name = verify
address_verify_transport_maps = $transport_maps
address_verify_virtual_transport = $virtual_transport
alias_database = $alias_maps
alias_maps = hash:/etc/postfix/aliases
allow_mail_to_commands = alias, forward
allow_mail_to_files = alias, forward
allow_min_user = no
allow_percent_hack = yes
allow_untrusted_routing = no
alternate_config_directories =
always_add_missing_headers = no
always_bcc =
anvil_rate_time_unit = 60s
anvil_status_update_time = 600s
append_at_myorigin = yes
append_dot_mydomain = ${{$compatibility_level} < {1} ? {yes} : {no}}
application_event_drain_time = 100s
authorized_flush_users = static:anyone
authorized_mailq_users = static:anyone
authorized_submit_users = static:anyone
backwards_bounce_logfile_compatibility = yes
berkeley_db_create_buffer_size = 16777216
berkeley_db_read_buffer_size = 131072
best_mx_transport =
biff = yes
body_checks =
body_checks_size_limit = 51200
bounce_notice_recipient = postmaster
bounce_queue_lifetime = 5d
bounce_service_name = bounce
bounce_size_limit = 50000
bounce_template_file =
broken_sasl_auth_clients = no
canonical_classes = envelope_sender, envelope_recipient, header_sender, header_recipient
canonical_maps =
cleanup_service_name = cleanup
command_directory = /usr/bin
command_execution_directory =
command_expansion_filter = 1234567890!@%-_=+:,./abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
command_time_limit = 1000s
compatibility_level = 2
config_directory = /etc/postfix
confirm_delay_cleared = no
connection_cache_protocol_timeout = 5s
connection_cache_service_name = scache
connection_cache_status_update_time = 600s
connection_cache_ttl_limit = 2s
content_filter =
cyrus_sasl_config_path =
daemon_directory = /usr/lib/postfix/bin
daemon_table_open_error_is_fatal = no
daemon_timeout = 18000s
data_directory = /var/lib/postfix
debug_peer_level = 2
debug_peer_list =
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5
default_database_type = hash
default_delivery_slot_cost = 5
default_delivery_slot_discount = 50
default_delivery_slot_loan = 3
default_delivery_status_filter =
default_destination_concurrency_failed_cohort_limit = 1
default_destination_concurrency_limit = 20
default_destination_concurrency_negative_feedback = 1
default_destination_concurrency_positive_feedback = 1
default_destination_rate_delay = 0s
default_destination_recipient_limit = 50
default_extra_recipient_limit = 1000
default_filter_nexthop =
default_minimum_delivery_slots = 3
default_privs = nobody
default_process_limit = 100
default_rbl_reply = $rbl_code Service unavailable; $rbl_class [$rbl_what] blocked using $rbl_domain${rbl_reason?; $rbl_reason}
default_recipient_limit = 20000
default_recipient_refill_delay = 5s
default_recipient_refill_limit = 100
default_transport = smtp
default_transport_rate_delay = 0s
default_verp_delimiters = +=
defer_code = 450
defer_service_name = defer
defer_transports =
delay_logging_resolution_limit = 2
delay_notice_recipient = postmaster
delay_warning_time = 0h
deliver_lock_attempts = 20
deliver_lock_delay = 1s
destination_concurrency_feedback_debug = no
detect_8bit_encoding_header = yes
disable_dns_lookups = no
disable_mime_input_processing = no
disable_mime_output_conversion = no
disable_verp_bounces = no
disable_vrfy_command = no
dns_ncache_ttl_fix_enable = no
dnsblog_reply_delay = 0s
dnsblog_service_name = dnsblog
dont_remove = 0
double_bounce_sender = double-bounce
duplicate_filter_limit = 1000
empty_address_default_transport_maps_lookup_key = <>
empty_address_recipient = MAILER-DAEMON
empty_address_relayhost_maps_lookup_key = <>
enable_idna2003_compatibility = no
enable_long_queue_ids = no
enable_original_recipient = yes
error_delivery_slot_cost = $default_delivery_slot_cost
error_delivery_slot_discount = $default_delivery_slot_discount
error_delivery_slot_loan = $default_delivery_slot_loan
error_destination_concurrency_failed_cohort_limit = $default_destination_concurrency_failed_cohort_limit
error_destination_concurrency_limit = $default_destination_concurrency_limit
error_destination_concurrency_negative_feedback = $default_destination_concurrency_negative_feedback
error_destination_concurrency_positive_feedback = $default_destination_concurrency_positive_feedback
error_destination_rate_delay = $default_destination_rate_delay
error_destination_recipient_limit = $default_destination_recipient_limit
error_extra_recipient_limit = $default_extra_recipient_limit
error_initial_destination_concurrency = $initial_destination_concurrency
error_minimum_delivery_slots = $default_minimum_delivery_slots
error_notice_recipient = postmaster
error_recipient_limit = $default_recipient_limit
error_recipient_refill_delay = $default_recipient_refill_delay
error_recipient_refill_limit = $default_recipient_refill_limit
error_service_name = error
error_transport_rate_delay = $default_transport_rate_delay
execution_directory_expansion_filter = 1234567890!@%-_=+:,./abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
expand_owner_alias = no
export_environment = TZ MAIL_CONFIG LANG
fallback_transport =
fallback_transport_maps =
fast_flush_domains = $relay_domains
fast_flush_purge_time = 7d
fast_flush_refresh_time = 12h
fault_injection_code = 0
flush_service_name = flush
fork_attempts = 5
fork_delay = 1s
forward_expansion_filter = 1234567890!@%-_=+:,./abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
forward_path = $home/.forward${recipient_delimiter}${extension}, $home/.forward
frozen_delivered_to = yes
hash_queue_depth = 1
hash_queue_names = deferred, defer
header_address_token_limit = 10240
header_checks =
header_size_limit = 102400
helpful_warnings = yes
home_mailbox = Maildir/
hopcount_limit = 50
html_directory = no
ignore_mx_lookup_error = no
import_environment = MAIL_CONFIG MAIL_DEBUG MAIL_LOGTAG TZ XAUTHORITY DISPLAY LANG=C
in_flow_delay = 1s
inet_interfaces = all
inet_protocols = ipv4
initial_destination_concurrency = 5
internal_mail_filter_classes =
invalid_hostname_reject_code = 501
ipc_idle = 5s
ipc_timeout = 3600s
ipc_ttl = 1000s
line_length_limit = 2048
lmdb_map_size = 16777216
lmtp_address_preference = any
lmtp_address_verify_target = rcpt
lmtp_assume_final = no
lmtp_bind_address =
lmtp_bind_address6 =
lmtp_body_checks =
lmtp_cname_overrides_servername = no
lmtp_connect_timeout = 0s
lmtp_connection_cache_destinations =
lmtp_connection_cache_on_demand = yes
lmtp_connection_cache_time_limit = 2s
lmtp_connection_reuse_count_limit = 0
lmtp_connection_reuse_time_limit = 300s
lmtp_data_done_timeout = 600s
lmtp_data_init_timeout = 120s
lmtp_data_xfer_timeout = 180s
lmtp_defer_if_no_mx_address_found = no
lmtp_delivery_slot_cost = $default_delivery_slot_cost
lmtp_delivery_slot_discount = $default_delivery_slot_discount
lmtp_delivery_slot_loan = $default_delivery_slot_loan
lmtp_delivery_status_filter = $default_delivery_status_filter
lmtp_destination_concurrency_failed_cohort_limit = $default_destination_concurrency_failed_cohort_limit
lmtp_destination_concurrency_limit = $default_destination_concurrency_limit
lmtp_destination_concurrency_negative_feedback = $default_destination_concurrency_negative_feedback
lmtp_destination_concurrency_positive_feedback = $default_destination_concurrency_positive_feedback
lmtp_destination_rate_delay = $default_destination_rate_delay
lmtp_destination_recipient_limit = $default_destination_recipient_limit
lmtp_discard_lhlo_keyword_address_maps =
lmtp_discard_lhlo_keywords =
lmtp_dns_reply_filter =
lmtp_dns_resolver_options =
lmtp_dns_support_level =
lmtp_enforce_tls = no
lmtp_extra_recipient_limit = $default_extra_recipient_limit
lmtp_fallback_relay =
lmtp_generic_maps =
lmtp_header_checks =
lmtp_host_lookup = dns
lmtp_initial_destination_concurrency = $initial_destination_concurrency
lmtp_lhlo_name = $myhostname
lmtp_lhlo_timeout = 300s
lmtp_line_length_limit = 998
lmtp_mail_timeout = 300s
lmtp_mime_header_checks =
lmtp_minimum_delivery_slots = $default_minimum_delivery_slots
lmtp_mx_address_limit = 5
lmtp_mx_session_limit = 2
lmtp_nested_header_checks =
lmtp_per_record_deadline = no
lmtp_pix_workaround_delay_time = 10s
lmtp_pix_workaround_maps =
lmtp_pix_workaround_threshold_time = 500s
lmtp_pix_workarounds = disable_esmtp,delay_dotcrlf
lmtp_quit_timeout = 300s
lmtp_quote_rfc821_envelope = yes
lmtp_randomize_addresses = yes
lmtp_rcpt_timeout = 300s
lmtp_recipient_limit = $default_recipient_limit
lmtp_recipient_refill_delay = $default_recipient_refill_delay
lmtp_recipient_refill_limit = $default_recipient_refill_limit
lmtp_reply_filter =
lmtp_rset_timeout = 20s
lmtp_sasl_auth_cache_name =
lmtp_sasl_auth_cache_time = 90d
lmtp_sasl_auth_enable = no
lmtp_sasl_auth_soft_bounce = yes
lmtp_sasl_mechanism_filter =
lmtp_sasl_password_maps =
lmtp_sasl_path =
lmtp_sasl_security_options = noplaintext, noanonymous
lmtp_sasl_tls_security_options = $lmtp_sasl_security_options
lmtp_sasl_tls_verified_security_options = $lmtp_sasl_tls_security_options
lmtp_sasl_type = cyrus
lmtp_send_dummy_mail_auth = no
lmtp_send_xforward_command = no
lmtp_sender_dependent_authentication = no
lmtp_skip_5xx_greeting = yes
lmtp_skip_quit_response = no
lmtp_starttls_timeout = 300s
lmtp_tcp_port = 24
lmtp_tls_CAfile =
lmtp_tls_CApath =
lmtp_tls_block_early_mail_reply = no
lmtp_tls_cert_file =
lmtp_tls_ciphers = medium
lmtp_tls_dcert_file =
lmtp_tls_dkey_file = $lmtp_tls_dcert_file
lmtp_tls_eccert_file =
lmtp_tls_eckey_file = $lmtp_tls_eccert_file
lmtp_tls_enforce_peername = yes
lmtp_tls_exclude_ciphers =
lmtp_tls_fingerprint_cert_match =
lmtp_tls_fingerprint_digest = md5
lmtp_tls_force_insecure_host_tlsa_lookup = no
lmtp_tls_key_file = $lmtp_tls_cert_file
lmtp_tls_loglevel = 0
lmtp_tls_mandatory_ciphers = medium
lmtp_tls_mandatory_exclude_ciphers =
lmtp_tls_mandatory_protocols = !SSLv2, !SSLv3
lmtp_tls_note_starttls_offer = no
lmtp_tls_per_site =
lmtp_tls_policy_maps =
lmtp_tls_protocols = !SSLv2, !SSLv3
lmtp_tls_scert_verifydepth = 9
lmtp_tls_secure_cert_match = nexthop
lmtp_tls_security_level =
lmtp_tls_session_cache_database =
lmtp_tls_session_cache_timeout = 3600s
lmtp_tls_trust_anchor_file =
lmtp_tls_verify_cert_match = hostname
lmtp_tls_wrappermode = no
lmtp_transport_rate_delay = $default_transport_rate_delay
lmtp_use_tls = no
lmtp_xforward_timeout = 300s
local_command_shell =
local_delivery_slot_cost = $default_delivery_slot_cost
local_delivery_slot_discount = $default_delivery_slot_discount
local_delivery_slot_loan = $default_delivery_slot_loan
local_delivery_status_filter = $default_delivery_status_filter
local_destination_concurrency_failed_cohort_limit = $default_destination_concurrency_failed_cohort_limit
local_destination_concurrency_limit = 2
local_destination_concurrency_negative_feedback = $default_destination_concurrency_negative_feedback
local_destination_concurrency_positive_feedback = $default_destination_concurrency_positive_feedback
local_destination_rate_delay = $default_destination_rate_delay
local_destination_recipient_limit = 1
local_extra_recipient_limit = $default_extra_recipient_limit
local_header_rewrite_clients = permit_inet_interfaces
local_initial_destination_concurrency = $initial_destination_concurrency
local_minimum_delivery_slots = $default_minimum_delivery_slots
local_recipient_limit = $default_recipient_limit
local_recipient_maps = proxy:unix:passwd.byname $alias_maps
local_recipient_refill_delay = $default_recipient_refill_delay
local_recipient_refill_limit = $default_recipient_refill_limit
local_transport = local:$myhostname
local_transport_rate_delay = $default_transport_rate_delay
luser_relay =
mail_name = Postfix
mail_owner = postfix
mail_release_date = 20171028
mail_spool_directory = /var/mail
mail_version = 3.2.4
mailbox_command = /usr/lib/dovecot/dovecot-lda
mailbox_command_maps =
mailbox_delivery_lock = fcntl, dotlock
mailbox_size_limit = 51200000
mailbox_transport =
mailbox_transport_maps =
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
maps_rbl_domains =
maps_rbl_reject_code = 554
masquerade_classes = envelope_sender, header_sender, header_recipient
masquerade_domains =
masquerade_exceptions =
master_service_disable =
max_idle = 100s
max_use = 100
maximal_backoff_time = 4000s
maximal_queue_lifetime = 5d
message_drop_headers = bcc, content-length, resent-bcc, return-path
message_reject_characters =
message_size_limit = 10240000
message_strip_characters =
meta_directory = /etc/postfix
milter_command_timeout = 30s
milter_connect_macros = j {daemon_name} {daemon_addr} v
milter_connect_timeout = 30s
milter_content_timeout = 300s
milter_data_macros = i
milter_default_action = tempfail
milter_end_of_data_macros = i
milter_end_of_header_macros = i
milter_header_checks =
milter_helo_macros = {tls_version} {cipher} {cipher_bits} {cert_subject} {cert_issuer}
milter_macro_daemon_name = $myhostname
milter_macro_defaults =
milter_macro_v = $mail_name $mail_version
milter_mail_macros = i {auth_type} {auth_authen} {auth_author} {mail_addr} {mail_host} {mail_mailer}
milter_protocol = 6
milter_rcpt_macros = i {rcpt_addr} {rcpt_host} {rcpt_mailer}
milter_unknown_command_macros =
mime_boundary_length_limit = 2048
mime_header_checks = $header_checks
mime_nesting_limit = 100
minimal_backoff_time = 300s
multi_instance_directories =
multi_instance_enable = no
multi_instance_group =
multi_instance_name =
multi_instance_wrapper =
multi_recipient_bounce_reject_code = 550
mydestination = $myhostname, localhost.$mydomain, localhost
mydomain = seandygroup.com
myhostname = mail.seandygroup.com
mynetworks = 127.0.0.1/32 172.104.58.43/32
mynetworks_style = ${{$compatibility_level} < {2} ? {subnet} : {host}}
myorigin = $mydomain
nested_header_checks = $header_checks
newaliases_path = /usr/bin/newaliases
non_fqdn_reject_code = 504
non_smtpd_milters =
notify_classes = resource, software
openssl_path = openssl
owner_request_special = yes
parent_domain_matches_subdomains = debug_peer_list,fast_flush_domains,mynetworks,permit_mx_backup_networks,qmqpd_authorized_clients,relay_domains,smtpd_access_maps
permit_mx_backup_networks =
pickup_service_name = pickup
pipe_delivery_status_filter = $default_delivery_status_filter
plaintext_reject_code = 450
postmulti_control_commands = reload flush
postmulti_start_commands = start
postmulti_stop_commands = stop abort drain quick-stop
postscreen_access_list = permit_mynetworks
postscreen_bare_newline_action = ignore
postscreen_bare_newline_enable = no
postscreen_bare_newline_ttl = 30d
postscreen_blacklist_action = ignore
postscreen_cache_cleanup_interval = 12h
postscreen_cache_map = btree:$data_directory/postscreen_cache
postscreen_cache_retention_time = 7d
postscreen_client_connection_count_limit = $smtpd_client_connection_count_limit
postscreen_command_count_limit = 20
postscreen_command_filter =
postscreen_command_time_limit = ${stress?{10}:{300}}s
postscreen_disable_vrfy_command = $disable_vrfy_command
postscreen_discard_ehlo_keyword_address_maps = $smtpd_discard_ehlo_keyword_address_maps
postscreen_discard_ehlo_keywords = $smtpd_discard_ehlo_keywords
postscreen_dnsbl_action = ignore
postscreen_dnsbl_max_ttl = ${postscreen_dnsbl_ttl?{$postscreen_dnsbl_ttl}:{1}}h
postscreen_dnsbl_min_ttl = 60s
postscreen_dnsbl_reply_map =
postscreen_dnsbl_sites =
postscreen_dnsbl_threshold = 1
postscreen_dnsbl_timeout = 10s
postscreen_dnsbl_whitelist_threshold = 0
postscreen_enforce_tls = $smtpd_enforce_tls
postscreen_expansion_filter = $smtpd_expansion_filter
postscreen_forbidden_commands = $smtpd_forbidden_commands
postscreen_greet_action = ignore
postscreen_greet_banner = $smtpd_banner
postscreen_greet_ttl = 1d
postscreen_greet_wait = ${stress?{2}:{6}}s
postscreen_helo_required = $smtpd_helo_required
postscreen_non_smtp_command_action = drop
postscreen_non_smtp_command_enable = no
postscreen_non_smtp_command_ttl = 30d
postscreen_pipelining_action = enforce
postscreen_pipelining_enable = no
postscreen_pipelining_ttl = 30d
postscreen_post_queue_limit = $default_process_limit
postscreen_pre_queue_limit = $default_process_limit
postscreen_reject_footer = $smtpd_reject_footer
postscreen_tls_security_level = $smtpd_tls_security_level
postscreen_upstream_proxy_protocol =
postscreen_upstream_proxy_timeout = 5s
postscreen_use_tls = $smtpd_use_tls
postscreen_watchdog_timeout = 10s
postscreen_whitelist_interfaces = static:all
prepend_delivered_header = command, file, forward
process_id = 31556
process_id_directory = pid
process_name = postconf
propagate_unmatched_extensions = canonical, virtual
proxy_interfaces =
proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $smtpd_sender_login_maps $sender_bcc_maps $recipient_bcc_maps $smtp_generic_maps $lmtp_generic_maps $alias_maps $smtpd_client_restrictions $smtpd_helo_restrictions $smtpd_sender_restrictions $smtpd_relay_restrictions $smtpd_recipient_restrictions
proxy_write_maps = $smtp_sasl_auth_cache_name $lmtp_sasl_auth_cache_name $address_verify_map $postscreen_cache_map
proxymap_service_name = proxymap
proxywrite_service_name = proxywrite
qmgr_clog_warn_time = 300s
qmgr_daemon_timeout = 1000s
qmgr_fudge_factor = 100
qmgr_ipc_timeout = 60s
qmgr_message_active_limit = 20000
qmgr_message_recipient_limit = 20000
qmgr_message_recipient_minimum = 10
qmqpd_authorized_clients =
qmqpd_client_port_logging = no
qmqpd_error_delay = 1s
qmqpd_timeout = 300s
queue_directory = /var/spool/postfix
queue_file_attribute_count_limit = 100
queue_minfree = 0
queue_run_delay = 300s
queue_service_name = qmgr
rbl_reply_maps =
readme_directory = /usr/share/doc/postfix
receive_override_options =
recipient_bcc_maps =
recipient_canonical_classes = envelope_recipient, header_recipient
recipient_canonical_maps =
recipient_delimiter =
reject_code = 554
reject_tempfail_action = defer_if_permit
relay_clientcerts =
relay_delivery_slot_cost = $default_delivery_slot_cost
relay_delivery_slot_discount = $default_delivery_slot_discount
relay_delivery_slot_loan = $default_delivery_slot_loan
relay_destination_concurrency_failed_cohort_limit = $default_destination_concurrency_failed_cohort_limit
relay_destination_concurrency_limit = $default_destination_concurrency_limit
relay_destination_concurrency_negative_feedback = $default_destination_concurrency_negative_feedback
relay_destination_concurrency_positive_feedback = $default_destination_concurrency_positive_feedback
relay_destination_rate_delay = $default_destination_rate_delay
relay_destination_recipient_limit = $default_destination_recipient_limit
relay_domains = ${{$compatibility_level} < {2} ? {$mydestination} : {}}
relay_domains_reject_code = 554
relay_extra_recipient_limit = $default_extra_recipient_limit
relay_initial_destination_concurrency = $initial_destination_concurrency
relay_minimum_delivery_slots = $default_minimum_delivery_slots
relay_recipient_limit = $default_recipient_limit
relay_recipient_maps =
relay_recipient_refill_delay = $default_recipient_refill_delay
relay_recipient_refill_limit = $default_recipient_refill_limit
relay_transport = relay
relay_transport_rate_delay = $default_transport_rate_delay
relayhost =
relocated_maps =
remote_header_rewrite_domain =
require_home_directory = no
reset_owner_alias = no
resolve_dequoted_address = yes
resolve_null_domain = no
resolve_numeric_domain = no
retry_delivery_slot_cost = $default_delivery_slot_cost
retry_delivery_slot_discount = $default_delivery_slot_discount
retry_delivery_slot_loan = $default_delivery_slot_loan
retry_destination_concurrency_failed_cohort_limit = $default_destination_concurrency_failed_cohort_limit
retry_destination_concurrency_limit = $default_destination_concurrency_limit
retry_destination_concurrency_negative_feedback = $default_destination_concurrency_negative_feedback
retry_destination_concurrency_positive_feedback = $default_destination_concurrency_positive_feedback
retry_destination_rate_delay = $default_destination_rate_delay
retry_destination_recipient_limit = $default_destination_recipient_limit
retry_extra_recipient_limit = $default_extra_recipient_limit
retry_initial_destination_concurrency = $initial_destination_concurrency
retry_minimum_delivery_slots = $default_minimum_delivery_slots
retry_recipient_limit = $default_recipient_limit
retry_recipient_refill_delay = $default_recipient_refill_delay
retry_recipient_refill_limit = $default_recipient_refill_limit
retry_transport_rate_delay = $default_transport_rate_delay
rewrite_service_name = rewrite
sample_directory = /etc/postfix
send_cyrus_sasl_authzid = no
sender_bcc_maps =
sender_canonical_classes = envelope_sender, header_sender
sender_canonical_maps =
sender_dependent_default_transport_maps =
sender_dependent_relayhost_maps =
sendmail_fix_line_endings = always
sendmail_path = /usr/bin/sendmail
service_throttle_time = 60s
setgid_group = postdrop
shlib_directory = /usr/lib/postfix
show_user_unknown_table_name = yes
showq_service_name = showq
smtp_address_preference = any
smtp_address_verify_target = rcpt
smtp_always_send_ehlo = yes
smtp_bind_address =
smtp_bind_address6 =
smtp_body_checks =
smtp_cname_overrides_servername = no
smtp_connect_timeout = 30s
smtp_connection_cache_destinations =
smtp_connection_cache_on_demand = yes
smtp_connection_cache_time_limit = 2s
smtp_connection_reuse_count_limit = 0
smtp_connection_reuse_time_limit = 300s
smtp_data_done_timeout = 600s
smtp_data_init_timeout = 120s
smtp_data_xfer_timeout = 180s
smtp_defer_if_no_mx_address_found = no
smtp_delivery_slot_cost = $default_delivery_slot_cost
smtp_delivery_slot_discount = $default_delivery_slot_discount
smtp_delivery_slot_loan = $default_delivery_slot_loan
smtp_delivery_status_filter = $default_delivery_status_filter
smtp_destination_concurrency_failed_cohort_limit = $default_destination_concurrency_failed_cohort_limit
smtp_destination_concurrency_limit = $default_destination_concurrency_limit
smtp_destination_concurrency_negative_feedback = $default_destination_concurrency_negative_feedback
smtp_destination_concurrency_positive_feedback = $default_destination_concurrency_positive_feedback
smtp_destination_rate_delay = $default_destination_rate_delay
smtp_destination_recipient_limit = $default_destination_recipient_limit
smtp_discard_ehlo_keyword_address_maps =
smtp_discard_ehlo_keywords =
smtp_dns_reply_filter =
smtp_dns_resolver_options =
smtp_dns_support_level =
smtp_enforce_tls = no
smtp_extra_recipient_limit = $default_extra_recipient_limit
smtp_fallback_relay = $fallback_relay
smtp_generic_maps =
smtp_header_checks =
smtp_helo_name = $myhostname
smtp_helo_timeout = 300s
smtp_host_lookup = dns
smtp_initial_destination_concurrency = $initial_destination_concurrency
smtp_line_length_limit = 998
smtp_mail_timeout = 300s
smtp_mime_header_checks =
smtp_minimum_delivery_slots = $default_minimum_delivery_slots
smtp_mx_address_limit = 5
smtp_mx_session_limit = 2
smtp_nested_header_checks =
smtp_never_send_ehlo = no
smtp_per_record_deadline = no
smtp_pix_workaround_delay_time = 10s
smtp_pix_workaround_maps =
smtp_pix_workaround_threshold_time = 500s
smtp_pix_workarounds = disable_esmtp,delay_dotcrlf
smtp_quit_timeout = 300s
smtp_quote_rfc821_envelope = yes
smtp_randomize_addresses = yes
smtp_rcpt_timeout = 300s
smtp_recipient_limit = $default_recipient_limit
smtp_recipient_refill_delay = $default_recipient_refill_delay
smtp_recipient_refill_limit = $default_recipient_refill_limit
smtp_reply_filter =
smtp_rset_timeout = 20s
smtp_sasl_auth_cache_name =
smtp_sasl_auth_cache_time = 90d
smtp_sasl_auth_enable = no
smtp_sasl_auth_soft_bounce = yes
smtp_sasl_mechanism_filter =
smtp_sasl_password_maps =
smtp_sasl_path =
smtp_sasl_security_options = noplaintext, noanonymous
smtp_sasl_tls_security_options = $smtp_sasl_security_options
smtp_sasl_tls_verified_security_options = $smtp_sasl_tls_security_options
smtp_sasl_type = cyrus
smtp_send_dummy_mail_auth = no
smtp_send_xforward_command = no
smtp_sender_dependent_authentication = no
smtp_skip_5xx_greeting = yes
smtp_skip_quit_response = yes
smtp_starttls_timeout = 300s
smtp_tcp_port = smtp
smtp_tls_CAfile =
smtp_tls_CApath =
smtp_tls_block_early_mail_reply = no
smtp_tls_cert_file =
smtp_tls_ciphers = medium
smtp_tls_dane_insecure_mx_policy = dane
smtp_tls_dcert_file =
smtp_tls_dkey_file = $smtp_tls_dcert_file
smtp_tls_eccert_file =
smtp_tls_eckey_file = $smtp_tls_eccert_file
smtp_tls_enforce_peername = yes
smtp_tls_exclude_ciphers =
smtp_tls_fingerprint_cert_match =
smtp_tls_fingerprint_digest = md5
smtp_tls_force_insecure_host_tlsa_lookup = no
smtp_tls_key_file = $smtp_tls_cert_file
smtp_tls_loglevel = 0
smtp_tls_mandatory_ciphers = medium
smtp_tls_mandatory_exclude_ciphers =
smtp_tls_mandatory_protocols = !SSLv2, !SSLv3
smtp_tls_note_starttls_offer = no
smtp_tls_per_site =
smtp_tls_policy_maps =
smtp_tls_protocols = !SSLv2, !SSLv3
smtp_tls_scert_verifydepth = 9
smtp_tls_secure_cert_match = nexthop, dot-nexthop
smtp_tls_security_level =
smtp_tls_session_cache_database =
smtp_tls_session_cache_timeout = 3600s
smtp_tls_trust_anchor_file =
smtp_tls_verify_cert_match = hostname
smtp_tls_wrappermode = no
smtp_transport_rate_delay = $default_transport_rate_delay
smtp_use_tls = no
smtp_xforward_timeout = 300s
smtpd_authorized_verp_clients = $authorized_verp_clients
smtpd_authorized_xclient_hosts =
smtpd_authorized_xforward_hosts =
smtpd_banner = $myhostname ESMTP $mail_name
smtpd_client_auth_rate_limit = 0
smtpd_client_connection_count_limit = 50
smtpd_client_connection_rate_limit = 0
smtpd_client_event_limit_exceptions = ${smtpd_client_connection_limit_exceptions:$mynetworks}
smtpd_client_message_rate_limit = 0
smtpd_client_new_tls_session_rate_limit = 0
smtpd_client_port_logging = no
smtpd_client_recipient_rate_limit = 0
smtpd_client_restrictions =
smtpd_command_filter =
smtpd_data_restrictions =
smtpd_delay_open_until_valid_rcpt = yes
smtpd_delay_reject = yes
smtpd_discard_ehlo_keyword_address_maps =
smtpd_discard_ehlo_keywords =
smtpd_dns_reply_filter =
smtpd_end_of_data_restrictions =
smtpd_enforce_tls = no
smtpd_error_sleep_time = 1s
smtpd_etrn_restrictions =
smtpd_expansion_filter = \t\40!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~
smtpd_forbidden_commands = CONNECT GET POST
smtpd_hard_error_limit = ${stress?{1}:{20}}
smtpd_helo_required = yes
smtpd_helo_restrictions = reject_non_fqdn_helo_hostname, reject_unknown_helo_hostname
smtpd_history_flush_threshold = 100
smtpd_junk_command_limit = ${stress?{1}:{100}}
smtpd_log_access_permit_actions =
smtpd_milter_maps =
smtpd_milters =
smtpd_noop_commands =
smtpd_null_access_lookup_key = <>
smtpd_peername_lookup = yes
smtpd_per_record_deadline = ${stress?{yes}:{no}}
smtpd_policy_service_default_action = 451 4.3.5 Server configuration problem
smtpd_policy_service_max_idle = 300s
smtpd_policy_service_max_ttl = 1000s
smtpd_policy_service_policy_context =
smtpd_policy_service_request_limit = 0
smtpd_policy_service_retry_delay = 1s
smtpd_policy_service_timeout = 100s
smtpd_policy_service_try_limit = 2
smtpd_proxy_ehlo = $myhostname
smtpd_proxy_filter =
smtpd_proxy_options =
smtpd_proxy_timeout = 100s
smtpd_recipient_limit = 1000
smtpd_recipient_overshoot_limit = 1000
smtpd_recipient_restrictions =
smtpd_reject_footer =
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = no
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_restriction_classes =
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = no
smtpd_sasl_exceptions_networks =
smtpd_sasl_local_domain =
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_service = smtp
smtpd_sasl_tls_security_options = $smtpd_sasl_security_options
smtpd_sasl_type = dovecot
smtpd_sender_login_maps =
smtpd_sender_restrictions =
smtpd_service_name = smtpd
smtpd_soft_error_limit = 10
smtpd_starttls_timeout = ${stress?{10}:{300}}s
smtpd_timeout = ${stress?{10}:{300}}s
smtpd_tls_CAfile =
smtpd_tls_CApath =
smtpd_tls_always_issue_session_ids = yes
smtpd_tls_ask_ccert = no
smtpd_tls_auth_only = yes
smtpd_tls_ccert_verifydepth = 9
smtpd_tls_cert_file = /etc/ssl/certs/dovecot.pem
smtpd_tls_ciphers = medium
smtpd_tls_dcert_file =
smtpd_tls_dh1024_param_file =
smtpd_tls_dh512_param_file =
smtpd_tls_dkey_file = $smtpd_tls_dcert_file
smtpd_tls_eccert_file =
smtpd_tls_eckey_file = $smtpd_tls_eccert_file
smtpd_tls_eecdh_grade = auto
smtpd_tls_exclude_ciphers =
smtpd_tls_fingerprint_digest = md5
smtpd_tls_key_file = /etc/ssl/private/dovecot.pem
smtpd_tls_loglevel = 1
smtpd_tls_mandatory_ciphers = medium
smtpd_tls_mandatory_exclude_ciphers =
smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
smtpd_tls_protocols = !SSLv2, !SSLv3
smtpd_tls_received_header = no
smtpd_tls_req_ccert = no
smtpd_tls_security_level = may
smtpd_tls_session_cache_database =
smtpd_tls_session_cache_timeout = 3600s
smtpd_tls_wrappermode = no
smtpd_upstream_proxy_protocol =
smtpd_upstream_proxy_timeout = 5s
smtpd_use_tls = no
smtputf8_autodetect_classes = sendmail, verify
smtputf8_enable = ${{$compatibility_level} < {1} ? {no} : {yes}}
soft_bounce = yes
stale_lock_time = 500s
stress =
strict_7bit_headers = no
strict_8bitmime = no
strict_8bitmime_body = no
strict_mailbox_ownership = yes
strict_mime_encoding_domain = no
strict_rfc821_envelopes = no
strict_smtputf8 = no
sun_mailtool_compatibility = no
swap_bangpath = yes
syslog_facility = mail
syslog_name = ${multi_instance_name?{$multi_instance_name}:{postfix}}
tcp_windowsize = 0
tls_append_default_CA = no
tls_daemon_random_bytes = 32
tls_dane_digest_agility = on
tls_dane_digests = sha512 sha256
tls_dane_trust_anchor_digest_enable = yes
tls_disable_workarounds =
tls_eecdh_auto_curves = X25519 X448 prime256v1 secp521r1 secp384r1
tls_eecdh_strong_curve = prime256v1
tls_eecdh_ultra_curve = secp384r1
tls_export_cipherlist = aNULL:-aNULL:HIGH:MEDIUM:LOW:EXPORT:+RC4:@STRENGTH
tls_high_cipherlist = aNULL:-aNULL:HIGH:@STRENGTH
tls_legacy_public_key_fingerprints = no
tls_low_cipherlist = aNULL:-aNULL:HIGH:MEDIUM:LOW:+RC4:@STRENGTH
tls_medium_cipherlist = aNULL:-aNULL:HIGH:MEDIUM:+RC4:@STRENGTH
tls_null_cipherlist = eNULL:!aNULL
tls_preempt_cipherlist = no
tls_random_bytes = 32
tls_random_exchange_name = ${data_directory}/prng_exch
tls_random_prng_update_period = 3600s
tls_random_reseed_period = 3600s
tls_random_source = dev:/dev/urandom
tls_session_ticket_cipher = aes-256-cbc
tls_ssl_options =
tls_wildcard_matches_multiple_labels = yes
tlsmgr_service_name = tlsmgr
tlsproxy_enforce_tls = $smtpd_enforce_tls
tlsproxy_service_name = tlsproxy
tlsproxy_tls_CAfile = $smtpd_tls_CAfile
tlsproxy_tls_CApath = $smtpd_tls_CApath
tlsproxy_tls_always_issue_session_ids = $smtpd_tls_always_issue_session_ids
tlsproxy_tls_ask_ccert = $smtpd_tls_ask_ccert
tlsproxy_tls_ccert_verifydepth = $smtpd_tls_ccert_verifydepth
tlsproxy_tls_cert_file = $smtpd_tls_cert_file
tlsproxy_tls_ciphers = $smtpd_tls_ciphers
tlsproxy_tls_dcert_file = $smtpd_tls_dcert_file
tlsproxy_tls_dh1024_param_file = $smtpd_tls_dh1024_param_file
tlsproxy_tls_dh512_param_file = $smtpd_tls_dh512_param_file
tlsproxy_tls_dkey_file = $smtpd_tls_dkey_file
tlsproxy_tls_eccert_file = $smtpd_tls_eccert_file
tlsproxy_tls_eckey_file = $smtpd_tls_eckey_file
tlsproxy_tls_eecdh_grade = $smtpd_tls_eecdh_grade
tlsproxy_tls_exclude_ciphers = $smtpd_tls_exclude_ciphers
tlsproxy_tls_fingerprint_digest = $smtpd_tls_fingerprint_digest
tlsproxy_tls_key_file = $smtpd_tls_key_file
tlsproxy_tls_loglevel = $smtpd_tls_loglevel
tlsproxy_tls_mandatory_ciphers = $smtpd_tls_mandatory_ciphers
tlsproxy_tls_mandatory_exclude_ciphers = $smtpd_tls_mandatory_exclude_ciphers
tlsproxy_tls_mandatory_protocols = $smtpd_tls_mandatory_protocols
tlsproxy_tls_protocols = $smtpd_tls_protocols
tlsproxy_tls_req_ccert = $smtpd_tls_req_ccert
tlsproxy_tls_security_level = $smtpd_tls_security_level
tlsproxy_use_tls = $smtpd_use_tls
tlsproxy_watchdog_timeout = 10s
trace_service_name = trace
transport_maps =
transport_retry_time = 60s
trigger_timeout = 10s
undisclosed_recipients_header =
unknown_address_reject_code = 450
unknown_address_tempfail_action = $reject_tempfail_action
unknown_client_reject_code = 450
unknown_helo_hostname_tempfail_action = $reject_tempfail_action
unknown_hostname_reject_code = 450
unknown_local_recipient_reject_code = 550
unknown_relay_recipient_reject_code = 550
unknown_virtual_alias_reject_code = 550
unknown_virtual_mailbox_reject_code = 550
unverified_recipient_defer_code = 450
unverified_recipient_reject_code = 450
unverified_recipient_reject_reason =
unverified_recipient_tempfail_action = $reject_tempfail_action
unverified_sender_defer_code = 450
unverified_sender_reject_code = 450
unverified_sender_reject_reason =
unverified_sender_tempfail_action = $reject_tempfail_action
verp_delimiter_filter = -=+
virtual_alias_address_length_limit = 1000
virtual_alias_domains = $virtual_alias_maps
virtual_alias_expansion_limit = 1000
virtual_alias_maps = hash:/etc/postfix/virtual
virtual_alias_recursion_limit = 1000
virtual_delivery_slot_cost = $default_delivery_slot_cost
virtual_delivery_slot_discount = $default_delivery_slot_discount
virtual_delivery_slot_loan = $default_delivery_slot_loan
virtual_delivery_status_filter = $default_delivery_status_filter
virtual_destination_concurrency_failed_cohort_limit = $default_destination_concurrency_failed_cohort_limit
virtual_destination_concurrency_limit = $default_destination_concurrency_limit
virtual_destination_concurrency_negative_feedback = $default_destination_concurrency_negative_feedback
virtual_destination_concurrency_positive_feedback = $default_destination_concurrency_positive_feedback
virtual_destination_rate_delay = $default_destination_rate_delay
virtual_destination_recipient_limit = $default_destination_recipient_limit
virtual_extra_recipient_limit = $default_extra_recipient_limit
virtual_gid_maps =
virtual_initial_destination_concurrency = $initial_destination_concurrency
virtual_mailbox_base =
virtual_mailbox_domains = $virtual_mailbox_maps
virtual_mailbox_limit = 51200000
virtual_mailbox_lock = fcntl, dotlock
virtual_mailbox_maps =
virtual_minimum_delivery_slots = $default_minimum_delivery_slots
virtual_minimum_uid = 100
virtual_recipient_limit = $default_recipient_limit
virtual_recipient_refill_delay = $default_recipient_refill_delay
virtual_recipient_refill_limit = $default_recipient_refill_limit
virtual_transport = virtual
virtual_transport_rate_delay = $default_transport_rate_delay
virtual_uid_maps =

And dovecot -n :

# 2.3.0 (c8b89eb): /etc/dovecot/dovecot.conf
# OS: Linux 4.14.12-x86_64-linode92 x86_64  
auth_mechanisms = plain login
mail_location = maildir:~/Maildir
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  args = scheme=PLAIN username_format=%n /etc/dovecot/users
  driver = passwd-file
}
service auth {
  unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0660
    user = postfix
  }
}
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_dh =  # hidden, use -P to show it
ssl_key =  # hidden, use -P to show it
userdb {
  args = username_format=%n /etc/dovecot/users
  driver = passwd-file
}

Last edited by wilbertliu (2018-01-12 10:08:47)

Offline

#2 2018-01-08 12:44:01

Slithery
Administrator
From: Norfolk, UK
Registered: 2013-12-01
Posts: 5,776

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Welcome to the forums wilbertliu smile

Please use [⁣code] tags instead of [⁣quote] tags when posting code and command outputs.

Please post any postfix logs from an unsuccessful connection attempt. Can you send with any other client? Can you connect and send manually using telnet/openssl?


No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

aur - dotfiles

Offline

#3 2018-01-08 13:15:32

wilbertliu
Member
Registered: 2018-01-08
Posts: 10

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Hello slithery,

Thank you for such a quick reply!
Just edited the post as well according to your guidance.

Actually it has no update on postfix log. I just tried to send email from Apple Mail, but it said it can’t connect to SMTP server. There’s just update on dovecot log that said imap-login or something.

I’ve tried to configure the other client such as Thunderbird, but that can’t connect either.

Hmm.., do you mind telling me the command to send mail using telnet / openssl? What I’ve tried is “telnet mail.domain.com 25” and is succeed. Also “openssl s_client -connect mail.domain.com:imaps” succeed.

Last edited by wilbertliu (2018-01-08 13:17:20)

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#4 2018-01-08 13:25:20

Slithery
Administrator
From: Norfolk, UK
Registered: 2013-12-01
Posts: 5,776

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Look at the 'How SMTP authentication works' section here...
https://workaround.org/ispmail/jessie/r … entication

Once authenticated you can send an email by doing...
https://linuxconfig.org/send-an-email-using-telnet


No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

aur - dotfiles

Offline

#5 2018-01-08 17:49:15

wilbertliu
Member
Registered: 2018-01-08
Posts: 10

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Now is really interesting. I could send email with those links that you gave to me, wow!
The more interesting thing is, why can't I send email with my mail client? Hmm..

Offline

#6 2018-01-08 17:59:23

Slithery
Administrator
From: Norfolk, UK
Registered: 2013-12-01
Posts: 5,776

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Just to check, you did run these tests on the machine that you're having trouble connecting with? If so we've ruled out an issue with the server and the network.

Unfortunately this only leaves Apple Mail as a possible culprit, which we can't help you with here. I suggest you try on the Apple forums (if there is such a thing).

Last edited by Slithery (2018-01-11 12:24:38)


No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

aur - dotfiles

Offline

#7 2018-01-09 01:31:54

wilbertliu
Member
Registered: 2018-01-08
Posts: 10

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Hmm.., I’m not sure about that. For some context, I’m using mac on my machine. I use terminal to do “ssh” to my VPS, which has ArchLinux installed. So I run the commands on my terminal after successfully authenticated via ssh.

Is that considered as “on the machine that having trouble”?

Also, I’ve used Thunderbird as well.. No luck.

Offline

#8 2018-01-09 09:39:34

Slithery
Administrator
From: Norfolk, UK
Registered: 2013-12-01
Posts: 5,776

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

wilbertliu wrote:

Is that considered as “on the machine that having trouble”?

No. You need to test if you can send an email directly from the Mac. Run the commands without sshing to your VPS, this will let us know if there is a networking issue somewhere.


No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

aur - dotfiles

Offline

#9 2018-01-09 14:54:08

wilbertliu
Member
Registered: 2018-01-08
Posts: 10

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Ah I see..

Now we got the enlightenment. Here's the result of running telnet mail.mydomain.com 25 :

Trying xxx...
telnet: connect to address xxx: Connection refused
Trying yyy...
telnet: connect to address yyy: No route to host
telnet: Unable to connect to remote host

Is there anything wrong with my server configuration?
Or maybe the DNS?

PS: That telnet command run on my mac.

Last edited by wilbertliu (2018-01-09 14:54:48)

Offline

#10 2018-01-10 15:18:22

wilbertliu
Member
Registered: 2018-01-08
Posts: 10

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Anyone can help on this please?

Offline

#11 2018-01-10 15:37:32

Slithery
Administrator
From: Norfolk, UK
Registered: 2013-12-01
Posts: 5,776

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Please don't bump threads, it's against the forums CoC.
https://wiki.archlinux.org/index.php/Co … ct#Bumping

OK, so there's a networking issue between you and your server.

Either you have a firewall on your server that's blocking port 25, or your ISP is blocking access. Do you get a reply from...

telnet black.slithery.uk 25

If you PM me the FQDN of your mail server I can try connecting from here, the combined outputs should tell us whether the problem is your ISP or the server.


No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

aur - dotfiles

Offline

#12 2018-01-11 01:37:01

wilbertliu
Member
Registered: 2018-01-08
Posts: 10

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Ah, really sorry for that, I apologize!

And here's the response of that command :

Trying 212.111.41.177...
telnet: connect to address 212.111.41.177: Operation timed out
Trying 64:ff9b::d46f:29b1...
telnet: connect to address 64:ff9b::d46f:29b1: No route to host
telnet: Unable to connect to remote host

Will PM you the details then..

Last edited by wilbertliu (2018-01-11 01:59:51)

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#13 2018-01-11 09:57:33

wilbertliu
Member
Registered: 2018-01-08
Posts: 10

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Alright never mind.

I switched to Docker and it works perfectly!
I encourage everyone that wants to setup an email server to follow this guide :
https://github.com/tomav/docker-mailserver
You can thank me later, I'm @wilbertliu on Twitter.

Have a nice day! smile

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#14 2018-01-11 10:09:52

Slithery
Administrator
From: Norfolk, UK
Registered: 2013-12-01
Posts: 5,776

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

slithery@red:~$ telnet mail.sXXXp.com 25
Trying XX.XX.XX.XX...
Connected to mail.sXXXp.com.
Escape character is '^]'.
220 mail.sXXXp.com ESMTP Postfix
quit
221 2.0.0 Bye
Connection closed by foreign host.
root@black:~# nmap -sV mail.sXXXp.com

Starting Nmap 7.60 ( https://nmap.org ) at 2018-01-11 09:46 GMT
Nmap scan report for mail.sXXXp.com (XX.XX.XX.XX)
Host is up (0.27s latency).
Other addresses for mail.sXXXp.com (not scanned): 2400:8901::f03c:91ff:fe8e:1e9e
rDNS record for XX.XX.XX.XX: sXXXp.com
Not shown: 993 closed ports
PORT    STATE SERVICE  VERSION
22/tcp  open  ssh      OpenSSH 7.6 (protocol 2.0)
25/tcp  open  smtp     Postfix smtpd
80/tcp  open  http     nginx 1.12.2
110/tcp open  pop3     Dovecot pop3d
143/tcp open  imap     Dovecot imapd
993/tcp open  ssl/imap Dovecot imapd
995/tcp open  ssl/pop3 Dovecot pop3d
Service Info: Host:  mail.sXXXp.com

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 13.04 seconds

So you can't reach my mailserver either, yet I have no problems with yours. The nmap scan also confirms that the correct ports are open on your server. The good news is your mailserver seems to be configured correctly.

This means that there's something blocking access at your end. Are you on a residential connection or is this school/employers network?
A lot of ISPs and institutions routinely block port 25 for security issues (it stops them becoming a source of spam botnets). For conformation can you run an nmap scan of your server from your Mac, you can find installation instructions here....

nmap -sV mail.sXXXp.com

Can you ask whoever runs your network if they are indeed blocking port 25?

PS - Well done on choosing Linode for your VPS, they're the only company I recommend and I use them for all my servers (mailserver included) smile

Last edited by Slithery (2018-01-11 11:30:27)


No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

aur - dotfiles

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#15 2018-01-11 11:19:40

wilbertliu
Member
Registered: 2018-01-08
Posts: 10

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Thank you man for trying, I really appreciate that! And yes, I use Linode. smile
But if you just recently tried it, most likely I've changed everything.

It works now from mail client, but still can't perform telnet from my mac.

However, thank you so much for helping!

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#16 2018-01-11 11:29:58

Slithery
Administrator
From: Norfolk, UK
Registered: 2013-12-01
Posts: 5,776

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Just to bring this thread to a satisfactory conclusion...

Your old setup was only listening on port 25 for smpt connections, which we discovered is being blocked by your network provider. However, your new setup also listens on port 587 for authenticated smtp which isn't blocked...

root@black:~# nmap -sV mail.sXXXp.com

Starting Nmap 7.60 ( https://nmap.org ) at 2018-01-11 11:21 GMT
Nmap scan report for mail.seandygroup.com (XX.XX.XX.XX)
Host is up (0.26s latency).
Other addresses for mail.sXXXp.com (not scanned): 2400:8901::f03c:91ff:fe8e:1e9e
rDNS record for XX.XX.XX.XX: sXXXp.com
Not shown: 994 closed ports
PORT    STATE SERVICE  VERSION
22/tcp  open  ssh      OpenSSH 7.6 (protocol 2.0)
25/tcp  open  smtp     Postfix smtpd
80/tcp  open  http     nginx 1.12.2
143/tcp open  imap     Dovecot imapd
587/tcp open  smtp     Postfix smtpd
993/tcp open  ssl/imap Dovecot imapd
Service Info: Host:  mail.sXXXp.com

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 13.00 seconds

My next post was going to be to get you to enable port 587 on your previous setup, which would have fixed the issue.

Edit - Please remember to mark this thread as [SOLVED].
https://wiki.archlinux.org/index.php/Co … ow_to_post

Last edited by Slithery (2018-01-11 11:33:48)


No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

aur - dotfiles

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#17 2018-01-12 04:05:12

wilbertliu
Member
Registered: 2018-01-08
Posts: 10

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

Ah I see..

Btw, I can't change the title of this thread, have tried to navigate here and there,
but can't find the option to do so, really.

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#18 2018-01-12 09:24:47

Slithery
Administrator
From: Norfolk, UK
Registered: 2013-12-01
Posts: 5,776

Re: [SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot

You need to edit your first post. There is a character limit though which you've probably hit, I'd change the title to...

[SOLVED] Can't Send But Can Receive Email Using Postfix & Dovecot


No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

aur - dotfiles

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