On 1 Jan 2018, at 14:30 (-0500), Alan Hodgson wrote:
On Mon, 2018-01-01 at 10:29 -0500, Bill Cole wrote:
[...]
HOWEVER, the idea of enforcing any standard on MIDs beyond gross format (e.g.: <[[:ascii:]]{3,996}>) on a system where the admin isn't the sole user is ludicrous.I've had good success junking anything with one of my domains in the message-id, where I know the mail isn't actually from someone in that domain. That's a pretty solid spam signature.
Yes, I was a bit imprecise. Very specific idiosyncratic MID patterns can be extremely accurate spam indicators. Enforcement of RFC or common practice "standards" is riskier than it is worth.
Lack of any message-id is also significant, but sadly there are still some real senders sending mail with no message-id.
Yes. It's one of the most annoying persistent sorts of mail sloppiness. -- Bill Cole b...@scconsult.com or billc...@apache.org (AKA @grumpybozo and many *@billmail.scconsult.com addresses) Currently Seeking Steady Work: https://linkedin.com/in/billcole
