Just a note on Sendmail, I have systems up that are running 60+ messages per sec in our (Sendmail Inc) HVMS clients. Granted, these systems are configured quite different than "out of the box". If you change MAX Load in the cf you should see performance improvements on mail servers that have high volume. Multiple spindles, and multiple queues will boost performance. My only point here is that Sendmail can be made to perform quite fast. Have a look at 8.12, it has no more setuid, and the performance is incredible over prior releases. I do not think SuSE will release the RPM for it until 7.3. I was able to get hooks into 8.12 for Reiser FS, thanks for your patience Claus Aussmann and Chris Mason :~) Regards, Jon On Sun, 16 Sep 2001, Matthias Andree wrote:
Ruprecht Helms schrieb am Samstag, den 15. September 2001:
For qmail you have a good replacement for the inetd (tcpserver). And
You don't need qmail for tcpserver; xinetd will also do.
Qmail is a modular mta, much faster than sendmail and you can configure
qmail faster than sendmail? In special cases maybe, with big per-mail recipient lists and with a lot of recipient MXs slow or down, but not in regular operation for 1-to-1 mailings. Configure sendmail in queue-only mode if inbound mail is slow.
In my LAN (10base2 wiring), qmail running on FreeBSD 4.4-RC (K6-2/300) sent 3.2 mails/s in a test, sendmail 8.5 mails/s, Postfix 15.3 mails/s. I didn't run that test on Linux because my Linux machines are too busy.
qmail's queue handling and preprocessing of inbound mail make it slow. It's SMTP client doesn't to ESMTP PIPELINING (Sendmail does neither, but Postfix does).
Bugtraq has been switched from qmail to Postfix for delivering mail because qmail was too slow and could not longer handle the load.
qmail is secure and reliable, so is Postfix.
it to use slow internetconnection by using serialmail. One other good fact is the using of Maildirs, so you are able to restore mails from backup if some mail gets lost. The mails will be stored in these directories like files.
You can use maildir with every MTA that is able to use procmail or maildrop as local delivery agent. Postfix will do maildir out of the box, just configure and you're set. Nothing particular of qmail.
I would not take the hassle of setting up qmail in a fresh installation. It's too much work, and too different. Postfix is basically unpack, make install if you do it manually, and rpm -Uhv if you install via RPM package.
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