3_postfix modify the mail server port number

The first line starting with no # In master. cf should be SMTP Inet n-n -- smtpd
This line indicates the SMTP process and
SMTP 25/tcp mail
SMTP 25/udp mail
Counterpart
Append a row to the end and modify the previous name, as shown in figure
Smtp2 Inet n--smtpd,
After saving, add a server process port number in/etc/services, for example:
Smtp2 26/tcp mail2
Smtp2 26/udp mail2
After saving, reload does not work. If you want to restart Postfix, you should be able to start ports 25 and 26 with identical functions at the same time.

OK

http://blog.csdn.net/yangfree990/article/details/5633235