Aside from slightly fumbling my install process, all went smoothly
except I override /mailman/config/postfix.cfg and didn't initially have
the new transport_file_type setting in my overriding file.
lists.mailman3.org was done first, but it didn't encounter this issue
because there's no override there.
The delivery and archiving of this message is the 'final' test.
Mark Sapiro <mark(a)msapiro.net> The highway is for gamblers,
San Francisco Bay Area, California better use your sense - B. Dylan