That lovely moment, when I have to spend an hour on mail delivery issue, only to find out the message was flagged as spam due to a faulty dns blacklist.

Though the way it got flagged is idiotic and funny at the same time, too.

The blacklist domain got parked, dunno why, and of course, all of the dns queries thus got redirected to a different dns server that just returned the A records of the dns park owners.

Guess what that causes when you use that blacklist? Every single email gets flagged, including that one of ours that I had to debug.

Fml, an hour of overtime for a stupid malfunctioning blacklist...