>>>>> "JRA" == Jay R Ashworth <jra@baylink.com> writes:
JRA> The controlling paragraphs are 2.4 and 4.1.2 in RFC 2821,
JRA> both of which specify that a local-part may be case
JRA> sensitive.
JRA> IE: oops. :-}
No oops on Mailman's part! We case preserve for the benefit of the
receiving smtpds, but I think it's perfectly valid for Mailman to
case-fold subscription keys.
-Barry