Name
F=P
Synopsis
The F=P
delivery agent
flag is used by sendmail.cf header commands to
force the inclusion of return-path information:
H?P?Return-Path: <$g>
The F=P
delivery agent flag has no special
internal meaning to sendmail. It is a convention
that is used only in the assorted Return-Path
:
header definitions (Return-Path:). See F= for a general description of this process.
The sender’s envelope address (the address that
would be used to return mail if it were bounced, for example) is
placed into $g
for use in the
Return-Path
: header line. This is usually done
during final delivery, although it can also be done for delivery
agents that lack a clear envelope address. The form of the address in
the $g
sendmail macro ($g) depends on the setting of the
F=p
delivery agent flag. Note that this is
normally the same as the address in the five character
"From
" line.
This F=P
flag should be used only with delivery
agents that perform final delivery (such as local
,
prog
, and *file*
), and which do
not add their own Return-Path
: header. This
F=P
flag should not be used for any delivery agent
that delivers using SMTP.
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