October 2007
Intermediate to advanced
1308 pages
161h 13m
English
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SaveFromLine
Save Unix-style From lines All versions
Many Unix MUAs, as well as some transmittal systems
such as UUCP, require that a mail-message header
begin with a line that begins with the
five-character sequence "From“. All other header lines must
adhere to the RFC2822 standard and be delimited with
a colon:
From jqp@Washington.DC.gov Mon Jan 01 12:35:25 2001 Return-Path: <jqp@Washington.DC.gov> Date: Mon, 01 Jan 2001 12:35:15 PDT From: jqp@Washington.DC.gov (John Q Public)
If you don’t set the SaveFromLine option, the first line in
the preceding example is stripped out by
sendmail. The SaveFromLine option
prevents this because it tells
sendmail to keep header lines
that begin with the five characters "From“. But note that it
also causes this header to no longer be recognized
as a header.
The forms of the SaveFromLine option are as
follows:
O SaveFromLine=bool ← configuration file (V8.7 and later) -OSaveFromLine=bool ← command line (V8.7 and later) define(`confSAVE_FROM_LINES',bool) ← mc configuration (V8.7 and later) -s ← command-line shorthand (not recommended) Ofbool ← configuration file (deprecated) -ofbool ← command line (deprecated)
The optional argument bool
is of type Boolean. If
bool is missing, this
option becomes true (the "From" line is saved). If the entire
option is missing, it defaults to false (neither
save the "From"
line nor recognize it as a header).
The SaveFromLine
option is not safe. If specified from the command
line, it can cause sendmail to relinquish its ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.