December 2002
Intermediate to advanced
1232 pages
56h 38m
English
Content preview from Sendmail, 3rd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
Name
F=X
Synopsis
Delivery agents that speak SMTP require
that any line of the message that begins with a dot have that dot
doubled. Delivery agents speak SMTP or LMTP when the
$u is missing from the A=
delivery agent equate. For example:
Mether, P=[ICP], F=msDFMuCX, S=11, R=21, A=TCP $h
An example of a file that contains leading dots is a troff(1) source file:
.\" Show example .Ps Mether, P=[ICP], F=msDFMuCX, S=11, R=21, A=TCP $h .Pe
In this example, three lines begin with a leading dot, but the
F=X delivery agent flag causes
sendmail to transmit the message as:
.." Show example ..Ps Mether, P=[ICP], F=msDFMuCX, S=11, R=21, A=TCP $h ..Pe
The extra leading dot is automatically restored to a single dot at the receiving end.
This F=X delivery agent flag should be used only
with delivery agents that speak SMTP or LMTP. It should not be used
with other delivery agents because they will not know to strip the
extra dots.
Note that declaring the local_lmtp FEATURE causes
this F=X delivery agent flag to be automatically
included for the local delivery agent (as well as
F=z, F=z).
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.