[rewrapped to fit <= 80 columns]
I demand that Timothy D. Lenz may or may not have written...
First, I don't know why, but everyone of your post comes through as a text attachment which has to be saved out to be read. Others on the list come through normal.
They look fine here. However, I notice that they're GPG-signed and have a structure as follows:
multipart/mixed multipart/signed text/plain application/pgp-signature text/plain
This last text/plain section is added by the list software; it's presumably also that which adds the containing multipart/mixed and moves the Content-Type header for the multipart/signed section out of the message headers into a MIME headers section in the message body.
This is signed by way of experiment; as sent, it has multipart/signed in the message headers. If you see the same with this message, you have buggy mail software (but seeing that it's MICROS~1 Lookout Express, that's not really surprising).
[snip]