The Windows web hosting servers provide support for various Microsoft technologies. As many activities are carried on over the web server, it might happen that the primary mail server IP address gets blocked in the spam checker websites.

It is possible to change the mail server IP address through cPanel by using /etc/mailips file. In the same way in Plesk, you can modify the outgoing mail server IP address by using the file – /var/qmail/control/smtproutes

The steps involved in changing the mail server IP address in Plesk are mentioned below:

1. Initially you must check the domain name that is hosted on the Windows hosting server by using the file mentioned below:


2. The file – /var/qmail/control/smtproutes, is not present on the Plesk server by default;you will have to create it:

vi /var/qmail/control/smtproutes

3. After that is done, you can add the new IP address in the format given below:

4. Save the file and then restart the qmail
/etc/init.d/qmail restart

Note: Please substitute the “187.156.x.2” with the original IP address and the “” with the original domain name.