[RndTbl] sendmail -t vs -f
Gilbert E. Detillieux
gedetil at cs.umanitoba.ca
Wed Feb 11 11:22:08 CST 2004
According to John Lange:
> I'm not certain how much the sendmail differs from postfix but when I
> tried the below suggested in postfix it did not alter the Return-Path in
> the message header. -t allows you to extract recipients from the message
> headers but the Return-Path remained set to whichever user invoked the
> command.
>
> In postfix you need the -f option as follows:
>
> sendmail -t -f testing at taxpayer.com <<MAIL
> From: "Angry Taxpayer" <testing at taxpayer.com>
> To: "Dave" <bob at taxisbad.com>
> Reply-To: "Paul Martin" <paulm at canadianrulingparty.gc.ca>
> Subject: Tax cuts
That does seem to be the case with sendmail... As the man page indicates...
-fname Sets the name of the ``from'' person (i.e., the
envelope sender of the mail). This address may
also be used in the From: header if that header is
missing during initial submission. The envelope
sender address is used as the recipient for deliv-
ery status notifications and may also appear in a
Return-Path: header. -f should only be used by
``trusted'' users (normally root, daemon, and net-
work) or if the person you are trying to become is
the same as the person you are. Otherwise, an X-
Authentication-Warning header will be added to the
message.
...
-t Read message for recipients. To:, Cc:, and Bcc:
lines will be scanned for recipient addresses. The
Bcc: line will be deleted before transmission.
So, in short, if you want to change the envelope "from" address, you need to
use "-f". If you want to pull the list of recipients from the message
headers, rather than explicitly list them on the command line, use "-t".
--
Gilbert E. Detillieux E-mail: <gedetil at cs.umanitoba.ca>
Dept. of Computer Science Web: http://www.cs.umanitoba.ca/~gedetil/
University of Manitoba Phone: (204)474-8161
Winnipeg, MB, CANADA R3T 2N2 Fax: (204)474-7609
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