Hi,
Even if I found a message stated it's not a good idea to send a
mail to many (1000+) recipients resulting in really poor
performance (and I agree because I already experienced such
performance issue), is there a way to tune Postfix to allow my
client to do a mass-mailing with about 2000 recipients?
Actually if my client does that, it gets more than 24hours to empty
the mail queue and many other server services get slow or even
unresponsive...
I'm trying to understand where are the main pitfalls. It seems spam/
virus scanning is the most consuming part.
I know I shouldn't white-list my client domain as it could easily
be used from "fake" emails, and if I remember correctly it's even
not really sure amavisd/spamassassin will respect that and won't
scan the messages.
Could someone with a heavy Postfix usage could tell me what he has
done to tune the mail server?
Thanks
Xavier
Xavier, try slowing down the rate at which emails can pass through
your smtp server... change these settings in your main.cf file (they
should be somewhere around your FAST ETRN SERVICE block):
smtpd_error_sleep_time = 7
smtpd_soft_error_limit = 4
smtpd_hard_error_limit = 7
I've used these in the past to limit how fast an attacker can try to
push email through my server (even though they all fail, the
attempted rate can bring your server down just the same).
Hope this helps.
--
Cameron Knowlton
InfuseCreative.com
Analyst
Tel: 250-382-0226
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