Pop 3 Error

I run a VPS with a simple postfix and courier based mail server. Both Imap and POP3, but recently when I try to auth with my pop3 it returns "Temporary problem, please try again later". Google hasn't turned up with much help.

Note: This is the case in both external clients and telnet localhost 110 then authing.

Wut do?!

Consult the logs, if there's nothing helpful you may need to turn on additional logging for what you're using.