Opening mailbox page in Plesk interface on Plesk for Linux server fails: No such file or directory

Symptoms

On a Plesk for Linux server, opening mailbox page in the Plesk interface Domains > example.com > Mail > Mail Accounts > [email protected] results in the error:

Server Error
500 PleskUtilException
mailmng-mailname failed: Unable to open dir /var/qmail/mailnames/example.com/john.doe/@attachments: No such file or directory System error 2: No such file or directory

Cause

Unclear.

Resolution

1. Connect to the server using SSH.

2. Repair the affected mailbox by executing the below command:

   # plesk repair mail [email protected]