Le 7 sept. 07 à 18:03, Benny Pedersen a écrit :


On Fri, September 7, 2007 10:46, Xavier Beaudouin wrote:
How many concurrent smtpd processes do you have on your MX?
Up to 1.5k per MX in peak during bot attacks.
Hum. Anvil on postfix is a very good idea to avoid too mutch ressources
utilization.

there needs to be limit on smtpd_policy.* in postfix

if one session got 10000 recpients, postfix call policyd 10000 times, one pr
recipient

remember this when limit is problem :-)

Allowing unlimited recipients per sessions is quite stupid and helps a lots dictionnaries attacks.

On my systems, I limit multi recipients to a max of 100 per smtp session.

And... smtp errors / warning to 5...

/Xavier

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