3 preline \- prepend lines to message
7 .B | preline \fIcommand
10 feeds each incoming mail message through
12 At the top of each message it inserts
30 environment variables.
36 line. You should use this option when the
37 recipient of the incoming mail message is actually under remote control,
38 but was sent here through
39 .B control/virtualdomains
45 line. You should use this option except for