> My point is, Mutt is my MTA and my MUA. I use Mutt's builtin IMAP, POP, and > SMTP. The emails I get from specific spammers have no message-id and that is > unique and if I can killfile based on that I will have eliminated another > category of bastards.
Mutt is not *receiving* your emails from the outside world, however. In that context, it's not your MTA. But yes, if you're getting messages with missing Message-IDs, that means your email provider's MTA is not adding them. w
