I am having the same issue described here:
When a Mac OS X "Mail.app" client POP's in for mail, I always get an error
log message like this:
vchkpw-pop3: password fail (pass: 'd502e3b49fb33d7f7d419d469b51a5a0') <EMAIL
Now, obviously 'd502e3b49fb33d7f7d419d469b51a5a0' isn't the password someone
typed into their mail client. Also, this changes for each POP attempt. The
unusual thing is the client reports no error, and downloads the mail just
Any ideas / suggestions / white rabbits to follow?