September 2004
Intermediate to advanced
192 pages
10h 12m
English
Content preview from sendmail 8.13 CompanionBecome 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,
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Chapter 4. Configure sendmail.cf with m4
In the cf subdirectory of the V8
sendmail source distribution, you will find the
file README. It contains easy-to-understand,
step-by-step instructions that will allow you to create a custom
configuration
file for your site. This chapter supplements that file.
What’s New with V8.13
Three new mc configuration macros
have
been introduced (which correspond to three new
sendmail configuration file options):
The new
confREJECT_LOG_INTERVALmcmacro (Section 4.1.1 [V8.13]) sets the newRejectLogIntervaloption (Section 24.1.11 [V8.13]). It specifies how often a message advising that connections are still being refused should be logged.The new
confREQUIRES_DIR_FSYNCmcmacro (Section 4.1.2 [V8.13]) sets the newRequiresDirfsyncoption (Section 24.1.12 [V8.13]). It causessendmailto change the effect if the compile-time flagREQUIRES_DIR_FSYNC(3.4.47[3ed]) at runtime.The new
confCONNECTION_RATE_WINDOW_SIZEmc macro (Section 4.1.3 [V8.13]) sets the newConnectionRateWindowSizeoption (Section 24.1.13 [V8.13]). It defines the window of time over which a count of the number of connections is maintained in order to enable connection rate-control.
Two existing options have been given new extensions that require two
new mc configuration macros:
The new
confTO_QUEUERETURN_DSNmc macro (Section 4.1.4[V8.13]) adds a new timeout to theTimeout.queuereturnoption (24.9.109.18[3ed]). This affects only normal DSN messages.The new
confTO_QUEUEWARN_DSNmc ...
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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.