Postfix not sending emails

Hi everyone,

I recently created a droplet with Ubuntu 12.04 and zpanel. I have dovecot and postfix working fine for webmail (roundcube). It sends and receives emails. I’m trying to use thunderbird to manage my email accounts but I can’t send emails through it, only receive. SMTP por is 25.

Ps: I can’t telnet 25 from remote I can telnet localhost 25 from ssh I can telnet 25 from ssh

Here’s my /etc/zpanel/configs/postfix/

a netstat -tupnl will show

my iptables are empty.

I don’t have any MX record registered on DO’s DNS Manager.

Any ideas?

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opening port 567 solved the problem. I followed this tutorial: <br>

I will give it a try on zPanel forums. It was working until yesterday. Not sure what I changed in the files that made it stop working. <br>I will try to enable the other ports to see if that solves the issue. Thanks Pablo

You’re more likely to find people that know how to use zPanel in the <a href=“”>zPanel Forums</a>. The <a href=“”>zPanel docs</a> might also be a good place to look. <br> <br>With that said, I wonder if zPanel is blocking access to Port 25 from the outside world b/c Port 25 is not secure. Have you tried the TLS/SSL SMTP port, instead?