Got a new server, Centos6/Plesk 10.4.4. Noticed Plesk admin was a bit slow, so checked top and discovered that postfix was at 800% CPU :| Nothing in the mail queue, so I have no idea what it's doing!
In Plesk > Server > Services management, there are two processes:
* SMTP Server (Postfix)
* Plesk milter (Postfix)
Stopping Plesk milter fixes the problem but also stops my SMTP server so I guess the two are interlinked.
I used the upgrade tool to switch to Qmail - now in Services, I see:
* SMTP Server (Qmail)
* Plesk milter (Postfix) (stopped)
And all seems well for now. However, I'm guessing that Postfix is the default MTA for a reason and may want to switch back, so:
* Any idea what is Plesk milter service vs SMTP Server service?
* Any idea what would cause such high CPU load?
In Plesk > Server > Services management, there are two processes:
* SMTP Server (Postfix)
* Plesk milter (Postfix)
Stopping Plesk milter fixes the problem but also stops my SMTP server so I guess the two are interlinked.
I used the upgrade tool to switch to Qmail - now in Services, I see:
* SMTP Server (Qmail)
* Plesk milter (Postfix) (stopped)
And all seems well for now. However, I'm guessing that Postfix is the default MTA for a reason and may want to switch back, so:
* Any idea what is Plesk milter service vs SMTP Server service?
* Any idea what would cause such high CPU load?