[net.mail.headers] that amazing ack

Margulies@CISL-SERVICE-MULTICS.ARPA ("Benson I. Margulies") (03/21/84)

1) Once again, the distinction between a mailing list and a
redistributor rears it head.  I think header-people should ack mail, not
the individuals.

2) Something is wrong with that header (MMDF seems to agree) such that
our mail server rejected it, so I did not immediately see the subject
and detect that it was an ack.