Mail-server in Plesk

Plesk supports Qmail and Postfix mail servers, however, only one MTA (Message Transfer Agents) can be installed and used at a time. To check the current MTA in use, look at

Plesk -> Settings -> Services Management

OR you can execute the following command from SSH

# /usr/local/psa/admin/bin/mailmng --features | grep SMTP_Server

Switching of  Mail-server 

Stop the SMTP service before you switch between the Mail servers, to avoid accepting of new emails and to deliver the emails that are in the mail queue.

Stop the SMTP service:

/usr/local/psa/admin/sbin/mailmng --stop-smtpd

Switch MTA from Qmail to Postfix:

/usr/local/psa/admin/sbin/autoinstaller --select-release-current --install-component postfix

OR switch MTA from PostFix to Qmail:

/usr/local/psa/admin/sbin/autoinstaller --select-release-current --install-component qmail

Note: The change of mail server won’t change the mail format and the directory location where the messages are stored. However, the emails in the mail queue will be removed since the MTA is reconfigured.




BUSY: Update operation was locked by another update process.
Having trouble updating Plesk? That sucks. Trying to kill the autoinstaller but it just won’t help?

There’s a psa-installer.lock file in /tmp/ which indicates Plesk a running installer. Be sure no installer is running and then delete this little bugger.