> I use some GMX accounts, and they apparently don't support plus > addressing (I just tried, and the message was refused with "550 > Requested action not taken: mailbox unavailable."). I suppose it would be > nice if they did support it, but I can't really fault them for not > supporting a non-standard Google invention.
It predates Google by a long shot.
It was a fairly standard config option back in the days of sendmail+procmail.
Stefan
