Occasionally, I’ll end up with a mailbox full of random data, alerts, or other useless things. If you have SSH access to the server, you can always clear out your mail spool, but if you connect to an IMAP server, you can use mutt to do the same thing. First, use mutt to connect to your server remotely (via IMAP over SSL in this example): mutt -f imaps://mail.yourdomain.com/ Once you’ve connected and logged in, press SHIFT-D (uppercase d).
If you recently upgraded to Plesk 8.4.0 with short names enabled, you may have found that it’s working with SMTP, but it doesn’t work with POP3 or IMAP. There’s a bug in the Plesk version that prevents the courier configuration from being updated. To correct the issue, first make sure that Plesk has short names enabled (Server > Mail). Once you’ve confirmed that Plesk thinks it’s enabled, add SHORTNAMES=1 to the following configuration files: