Sixohthree.com qmail fixed
Today I fixed a configuration problem with the qmail SMTP server handling sixohthree.com mail. Incoming messages from Gmail have been failing even though my port was open and accepting connections. Turns out I was still attempting connections to the mail blacklist service at ORDB, which went offline in December. Whoops. Any incoming SMTP connection that wouldn't wait for the timeout (ie Gmail) would assume my mail server wasn't responding and would kick back an error to the sender. I don't get a lot of e-mail so it took a while for the problem to become noticeable.
Watch out for that one.