October 2007
Intermediate to advanced
1308 pages
161h 13m
English
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HeloName
Set the name for the HELO/EHLO commands V8.14 and later
When sendmail connects to a
listening MTA server, it waits for the 220 greeting
and then sends its HELO or EHLO command:
220 foo.example.com ESMTP Sendmail 8.14.0/8.14.0; Fri, 14 Dec 2007 11:53:38 −0800 (PST) EHLO your.host.domain
Normally, the hostname following the HELO or EHLO is the value of the
$j macro ($j on page 830). There may be
instances, however, when the value of $j is not correct. For
example, when the value assigned to $j is one that is not
known to the outside world (such as
host.inside.example.com),
this would mean that the hostname following HELO or EHLO could not be looked
up, potentially causing some sites to reject that
HELO or
EHLO command.
In such a circumstance the HeloName option can be used to set a
new value.
The forms of the HeloName option are as follows:
OHeloName=domain ← configuration file (V8.14 and later) -OHeloName=domain ← command line (V8.14 and later) define(`confHELO_NAME',domain) ← mc configuration (V8.14 and later)
The value of domain
must be a canonical hostname that can be looked up
using DNS. The string you specify is used as is. Do
not include macros in the declaration because they
will be used literally, not expanded.
The HeloName option
is not safe. If specified from the command line, it
can cause sendmail to
relinquish its special privileges.
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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.