I'm not sure if it would make a difference but in your membership options to the list
you can choose the format of the messages and how you'd like to receive them. I know
my settings are plain text but I haven't played with the others to know if they have
an option like that.
The only time I've seen base 64 coded stuff are spam pop-ups trying to bypass
plaintext filters. Interesting to hear there's some legitimate usage happening.
-------- Original message --------From: jonas at otter.se Date: 12/2/16 4:45 AM
(GMT-06:00) To: cctech at
classiccmp.org Subject: Base 64 posts to the list
some list posts have begun appearing in Base 64 format. I read
the list in daily digest mode, and these posts are not converted to
anything sensible