Linux – Iredmail – Postfix: Mail Server receive emails but not send

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I have a server with iredmail configured and I can't send email. I receive that message in postfix log:

00C3CC04FA: to=jeanpierre.carvalho@solfut.com, relay=none, delay=4797, delays=4766/0.04/30/0, dsn=4.4.1, status=deferred (connect to mail.solfut.com[80.172.244.187]:25: Connection timed out)

With Gmail happens the same.

Thanks!

Best Answer

When you test the remote mail server with 

echo | telnet mail.solfut.com 25

you should get Connected to mail.solfut.com.

If not, then you have a 'simple network issue'.

Try to disable your firewall (or better allow outcoming port TCP 25) in your firewall.

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