Mail server: receiving mail from Gmail doesn't work

Gradient · 2014-12-06 03:14:01

I have setup a mail server with Postfix and Dovecot.

These commands WORK from another machine (from within the same home network then that of the mail server, if this is relevant) :

$ telnet example.com 25
$ mail user@example.com

The MX records seem right to me.

$ dig mydomain.com MX
example.com.               157     IN      MX      10 mx1.example.com.
example.com.               157     IN      MX      20 mx2.example.com.
mx2.example.com.           1205    IN      A       111.111.111.111
mx1.example.com.           1205    IN      A       111.111.111.111

It seems like port 25 is open and accessible from the outside since the command mail user@example.com works from another machine. However, I am unable to receive email sent from Gmail or Outlook. What could be the reason?

foutrelis · 2014-12-06 08:42:48

You need to check if port 25 is accessible from the Internet. Testing from another machine on the same network won't yield any useful results.

rumpelsepp · 2014-12-06 18:01:27

AFAIK you need an encrypted connection for taking with Gmail. try setting up STARTTLS for your postfix.

rekahsoft · 2014-12-07 02:22:35

Are you setting up your mail server on a real domain? Or using a dynamic DNS? If you're using the latter you're out of luck as you will be blocked by spam filters/your isp. Otherwise it looks like you cannot access the smtp service outside of your network. Like others have mentioned above, check your firewall. With iptables its as simple as (as root):

iptables -nvL

Arch Linux

#1 2014-12-06 03:14:01

Mail server: receiving mail from Gmail doesn't work

#2 2014-12-06 08:42:48

Re: Mail server: receiving mail from Gmail doesn't work

#3 2014-12-06 18:01:27

Re: Mail server: receiving mail from Gmail doesn't work

#4 2014-12-07 02:22:35

Re: Mail server: receiving mail from Gmail doesn't work

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