The message appears to be coming from my server and is being delivered to an external server that is not being hosted by my server. The local account that QMail is claiming the mail is being sent from is not even a valid POP3 account.
Try `grep -ri "email.domain.com" /home/vpopmail/domains` (where the address in your log that the message went to is [EMAIL PROTECTED]) to see if the address in question is a forwarding address on any account you host. It is possible that it's a remote catchall, and could get listed in the log that way.
--
Tom Collins
[EMAIL PROTECTED]