qmail-pop3d Problems

Note to self:

My mom’s computer was unable to check her email with Mail.app. IMAP worked fine. When logging in by telnetting to port 110, the following error about being unable to read the home directory was received, yet the proper permissions was there:

-ERR this user has no $HOME/Maildir

My mom also reported that occasionally she was able to check her email just fine.

The problem ended up being that Mail.app was set to leave all mail on the server. By the time there were around 1400 messages in her inbox (stacked up over the past eight months or so) it seems that these messages were simply too much for qmail-pop3d to parse upon login, and the error was received.

It should be noted that the log for qmail-pop3d showed a successful login with an unsuccessful one immediately following.

The solution was to ensure that she had all her mail, then clear out the POP3 server. Now everything works fine.