Linux > Plesk

Switch Mail Server from Qmail to Postfix and Vice versa

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nandulalr:
We can check currently using MTA from the Services Management page at Home > Services Management:

--- Code: ---- SMTP Server (Postfix)
- SMTP Server (QMail)

--- End code ---

Also, we can  check the MTA using the Plesk utility through the command line:

--- Code: ---# plesk sbin mailmng-server --features | grep SMTP_Server

--- End code ---
or

--- Code: ---# plesk sbin mailmng-server --features | grep SMTP_Server

--- End code ---

MTA can be switched from QMail to Postfix and back using the auto installer script and command line.

Via Plesk UI:
Select QMail or Postfix SMTP server under Mail hosting section in Plesk > Tools & Settings > Updates and Upgrades > Add/Remove Components

Via command line:
- To switch the MTA to Postfix:

--- Code: ---# plesk installer --select-release-current --install-component postfix

--- End code ---
- To switch the MTA to QMail:

--- Code: ---# plesk installer --select-release-current --install-component qmail

--- End code ---

Alternatively, we can change the MTA by running the below command:

--- Code: ---# plesk installer

--- End code ---
Follow instructions and select QMail or Postfix SMTP server under Mail hosting section.

Additional Information
Before switching, it is recommended you wait until all queued emails are delivered and stop the SMTP service to stop receiving emails.

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