Plesk : Unable to send or receive emails to users in the domain hosted in the server

Customers were not receiving any emails or unable to send email to users in the domain hosted in the server.

Log was saying

Server Error: 421 fopen(‘users/assign’) failed (#5.7.10) Permission denied.

As the log says, it is permission or ownership issue with the folder. We could have reset that file alone, but almost all the ownerships & permissions were messed up. So the first step was to use the mchk utility. Issued /usr/local/psa/admin/sbin/mchk –with-spam

But that didn’t fix the issue and we had to force the reinstallation/upgrade of psa-qmail package available as an rpm. Reinstalled and mail started working.

Parallels KB is improving day by day and even better than cPanel documentation. Refer http://kb.parallels.com/en/944 for more details on mchk.exe usage.

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