Linux Plesk Server Management

You can easily change the mail server ip address in cpanel by using /etc/mailips file. The same as in PLESK you can also change the outgoing mail server ip address by using “/var/qmail/control/smtproutes” file.
first check the domain name which is hosted on the server by using following file

1) cat /var/qmail/control/rcpthosts
domain1.com
domain2.com
domain3.com
domain4.com
domain5.com

2) By default the “/var/qmail/control/smtproutes” file is not present on PLESK server, you need to create it.

vi /var/qmail/control/smtproutes

3) Then add the new ip address in the following format.

domain1.com:111.222.333.444
domain2.com:111.222.333.444

4) Save the file and restart qmail

/etc/init.d/qmail restart

Replace the domain.com with your own domain name and the IP 111.222.333.444