Ubuntu 12.04 can't send emails

Hi, just finished installing ISP Config 3 with perfect server guide on Ubuntu server 12.04 and created a domain and a email mailbox for that domain.

I can receive emails from that email box and squirrelmail, from gmail and my google apps accounts, but when replying, the email get sent, but can't receive it on the destination mailboxes.

Where can I start looking?

Thanks a lot!

 

Well, it's completely empty!, really!

 

Hi, looking into sys.log, i have seen this suspicious lines...

 

Please check if your server is blacklisted: http://mxtoolbox.com/blacklists.aspx

 

Nope, no blacklist at all
http://mxtoolbox.com/SuperTool.aspx?action=blacklist:201.253.217.242

Can I test someting directly in the server to see what happens?

Thanks in advise!

 

Well, erased mail.log and restarted, and logging started again, here is the log, it seems that can not connect on port 25, maybe my ISP is blocking it?

 

Hi, I will call mi ISP, because I have used ISPConfig in the past with no problems. Meanwhile, is there any configuration to use postfix on alternate ports?

Thanks a lot!

 

Well, my ISP Arnet is blocking port 25, they confirmed it. Is there any config that I may change to get POSTFIX use alternate ports (587, 465) instead?

Thanks!

 

edit master.cf and change:

Code:

smtp      inet  n       -       -       -       -       smtpd
#submission inet n       -       -       -       -       smtpd

for this:

Code:

#smtp      inet  n       -       -       -       -       smtpd
submission inet n       -       -       -       -       smtpd

and restart postfix

Code:

/etc/init.d/postfix restart

Cheers!

 

Well, changed as suggested, but stills tryes to send through port 25.

master.cf

mail.log

 

Hello,

Try settings this smtp server as relay:
smtp.arnet.com.ar

 

Yes. using arnet as relay works ok.

It is possible to use google apps account for relay?

Thanks in advise!

 

Try look at this page:
https://www.zulius.com/how-to/set-up-postfix-with-a-remote-smtp-relay-host/