I believe we've noted before that it isn't a question of us not supporting
qmail, it's a question of the qmail author not wanting to implement "Notary"
format error codes or something along those lines.  Again, one of the
largest LISTSERV sites <is> running qmail :)  Anyway the prior discussion
is in the archives, either here or on LSTSRV-L (which would really be a
better place to ask).

Nathan