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Diffstat (limited to 'debian/README.Debian.sendmail')
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diff --git a/debian/README.Debian.sendmail b/debian/README.Debian.sendmail new file mode 100644 index 0000000..6188f37 --- /dev/null +++ b/debian/README.Debian.sendmail @@ -0,0 +1,111 @@ + ***** Important notes on sendmail 8.12.0 **** + +*) This is a significant improvement in security, functionality and speed ! + I strongly urge you to install sendmail-doc and peruse files here and in + /usr/share/doc/sendmail-doc + +*) Sendmail has extended control over queue management, and these changes can + cause a performance drop if you don't change your local configuration. + + Old: + MaxDaemonChildren controlled number of listener *and* queue runners + + Sendmail would fork as many children as needed to run the queues + + New: + MaxDaemonChildren still works as a total limit + MaxQueueChildren limits *only* the number of total queue runners + MaxRunnersPerQueue limits the number of runners per individual + queue (in 8.11+, you can have multiple queues) -- *AND* you + can override this global limit on per queue basis! + MaxQueueRunSize limits the number of messages processed per queue run + + Sendmail only forks upto MaxRunnersPerQueue for each queue per run + + The gotcha here is that MaxRunnersPerQueue defaults to one ! + + I've changed the default MaxRunnersPerQueue to 5, so deliveries aren't + single threaded, but you may want to have more or less than 5. + +*) Check out queue groups!!! It can significantly improve throughput + see /usr/share/doc/sendmail-doc/cf.README.gz + and /usr/share/doc/sendmail-doc/op/op.{ps,txt}.gz + +*) Sendmail is *much* more secure now, and you'll never have problems + because sendmail doesn't accept new submissions (when using the sendmail + command, TCP connections will still be refused). + + Message submission (sendmail -bs, -m, etc.) now use a SGID binary and + a separate g+w message queue. + + see /usr/share/doc/sendmail-doc/sendmail.SECURITY.gz for further info + on the changes - which should be transparent to both the admin and user. + +*) The Debian package includes the ability to run sendmail in a variety of + ways: + MTA listener (port 25): None, daemon, or via INETD + MTA queue runner: None, daemon, or via cron + MSP queue runner: None, daemon, or via cron + MTA queue aging: None, or via cron + See /etc/mail/sendmail.conf for more details + +*) Sendmail now supports multiple queues! You can distribute queues + across devices, and the queues are run independantly - improving + throughput ! + +*) There are new queue sort orders - amongst them are: + FileName: removes the need to read .qf files + Random: good for multi-queue runners + +*) Virtual hosting support has been enhanced in the os/site debian.m4 + file. If you need more, checkout DAEMON_OPTIONS (Modifier=b) + see /usr/share/doc/sendmail-doc/cf.README.gz + and /usr/share/doc/sendmail-doc/op.{ps,txt}.gz + let me know what you think - any more extensions you'd like to see? + +*) IPv6 support is inboard, but Linux does things oddly (and differently + wrt kernel versions)... To run IPv6 on 2.2.x and 2.4.x, try this: + FEATURE(`no_default_msa')dnl + CLIENT_OPTIONS(`Family=inet6, Modifier=h')dnl + DAEMON_OPTIONS(`Port=smtp, Name=MTA-v6, Family=inet6')dnl + DAEMON_OPTIONS(`Port=587, Name=MSA-v6, Family=inet6, M=aE')dnl + +*) Sendmail now always uses TCP wrappers (/etc/hosts.allow /etc/hosts.deny) + This is a change from prior versions where wrapper support was enabled + via sendmail.mc. + + Please make sure you add the appropriate entry to the /etc/hosts.* file. + The most likely candidate is to place sendmail: all in /etc/hosts.allow + +*) sendmail.st (for mailstats command) is *NOT* automagically created + because writing the statistic can be a performance hinderance. + If you want statistics: touch /var/lib/sendmail/sendmail.st + +*) You should *really* read RELEASE_NOTES... There are *many* changes for + spam control. + A) Relaying is, by default, prohibitted + B) Mail from non-resolvable domains is, by default, prohibitted + + **** Other information **** + +This Debian package includes an automatic configuration utility +`sendmailconfig' which can be run at any time to modify the current sendmail +configuration. + +Most mail-related configuration files are kept in the /etc/mail directory. + +Specialized configurations can be accomplished by editing the file +/etc/mail/sendmail.mc by hand and then running `sendmailconfig' to generate +and use the appropriate corresponding sendmail.cf file. Such configurations +can make use of the m4 configuration macros kept in the +/usr/share/sendmail/cf directory. + +See also the other documentation in this directory and in the optional +directory /usr/share/doc/sendmail-doc (installed via sendmail-doc package). + +Finally, the file /etc/aliases holds a text representation of the current mail +aliases. See the aliases(5) man page for more information. If you edit this +file, be sure to run `newaliases' to update the corresponding binary database. + +Rick Nelson +cowboy@debian.org |