3 ezmlm-reject \- reject messages unsuitable for distribution
11 reads a mail message from its standard input.
12 It rejects the message if it sees something it doesn't like.
17 Commands are not permitted in the Subject line.
18 A Subject line consisting solely of HELP, SUBSCRIBE, or UNSUBSCRIBE
22 Commands are permitted in the subject line.
26 A nonempty Subject line is required.
29 A Subject line is not required.