Change Sentora and Postfix SMTP port 25

[Sonichaos]

Sorry for my beginner's english. I just want to help. I was having the same problem on using SMTP from outside and after a long time of investigation and testing i discovered that my internet provider was blocking my port 25. The effective solution was change the SMTP port from my server editing the master.cf file on \etc\postfix\

Just search the next line:

Code:

smtp      inet  n       -       n       -       -       smtpd

And just bottom add this line:

Code:

587       inet  n       -       n       -       -       smtpd

And restart postfix service. Now your SMTP port is 587 and if it was a problem with the port 25 blocking it should work.