> list wrote:
> This is really a Postfix and Spamassassin question
> rather than one for the Anomy users list.
> However... SpamAssassin is heavy on resources, period.
> Using spamc / spamd helps, but if your server is low on
> memory or processor speed it won't make a huge
> You can limit how many SMTP messages Postfix will
> receive simultaneously
> by editing master.cf and changing the
> maxproc column for the the smtpd line. For
> smtp inet n - n - 10
> (the above would change the max SMTP connections from
> 100 to 10).
> That's not a great solution, though... it'll limit your
> outbound mail too. If you have another server on your LAN
> that's less busy, perhaps you could install spamassassin on
> that and configure spamc to send the spam checking to it
> (ie. with "spamc -d").
> Impossible to say without seeing the Postfix logs (and
> no, please don't post them here! ;-) That the messages are
> mostly bounces is a good sign a spammer used your domain as
> a fake return address. Usually a DoS attack against a mail
> server appears as a bunch of connections that timeout with
> no mail actually being sent, or a gazillion garbage
> messages to <postmaster>.
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