I had a message marked with:
2.3 EMPTY_MESSAGE Message appears to have no textual parts and no
Subject:
It did not have a subject, but it did have content (although only
encrypted).... it also hit:
* 1.8 MISSING_SUBJECT Missing Subject: header
which makes sense, because the mail did not have one, but have you
looked in your Spam folder lately? All spam has a subject, pretty much
always.... an informal survey of my trash heap showed 4 messages out of
400 did not have a Subject, and two of them were repeats.
--
micah