Several people have reported Mailman messages notifying them of their
subscription being suspended because of bounces.
The notifications are pukka and appear to have resulted from a reaction
by Google's mail servers to messages via this list from an invalid
address at a valid domain.
The Mailman admins have implemented a workaround and have attempted to
reactivate all gmail accounts. Please check your susbcription per the
notification email. If you have any problems, drop a line to
python-l...@python.org.
(With thanks to Ralf Hildebrandt who's done all the legwork...)
TJG