September 2004
Intermediate to advanced
192 pages
10h 12m
English
Content preview from sendmail 8.13 Companion
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,
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.
A Useful Table
The sendmail program reserves all lowercase
letters, punctuation characters, and digits for its own use. For
multi-character names, it reserves all those that begin with an
underscore or a lowercase letter. Table 21-1 lists
all the macro names that have special internal meaning to
sendmail. Included in this list are macros that
are used by the mc configuration
technique.[29]
Table 21-1. Reserved macros
|
Macro |
sendmail text reference |
Description |
|---|---|---|
|
|
21.9.1[3ed] |
RFC1413-validation and IP source route |
|
|
21.9.2[3ed] |
The origin date in RFC822 format |
|
|
21.9.3[3ed] |
Is address recipient/sender or header/envelope? |
|
|
21.9.4[3ed] |
The number of bits in the TLS cipher |
|
|
21.9.5[3ed] |
RFC2554 SASL AUTH credentials |
|
|
21.9.6[3ed] |
RFC2554 SASL AUTH= parameter |
|
|
21.9.7[3ed] |
SASL AUTH encryption key length |
|
|
21.9.8[3ed] |
SASL Authentication mechanism used |
|
|
21.9.9[3ed] |
The current date in RFC2822 format |
|
|
21.9.10[3ed] |
The ESMTP (Extended SMTP) BODY parameter |
|
|
21.9.11[3ed] |
The BITNET relay (mc configuration, deprecated) |
|
|
21.9.12[3ed] |
The hop count |
|
|
21.9.13[3ed] |
Distinguished name of certificate signer |
|
|
21.9.14[3ed] |
MD5 of cert certificate |
|
|
21.9.15[3ed] |
The cert subject |
|
|
21.9.16[3ed] |
Cipher suite used for connection |
|
|
21.9.17[3ed] |
TLS encryption ... |
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.