Dan Lists:
> How much traffic can postscreen handle? Each mail server in our
> cluster handles 800,000 to 1,000,000 messages per day. We typically
This is mainly limited by the whitelist database latency: the
time needed to decide that a client is OK, and to hand off the
connection to a real SMTP server process.
In your example, postscreen would have to be able to do 10 lookups
a second, but we all know that mail is not spread out evenly over
a day, so 100 lookups/second would be more appropriate.
If the number of distinct clients is not overwhelmingly large,
putting a memcache between postscreen and the persistent whitelist
database will help to reduce whitelist lookup latency.
> have 60-120 smptd processes, with peaks as high as 320. Adding a
> greeting delay will result in a lot of open connections. Can
> postscreen handle this volume even with the postscreen_greet_wait
> value of 6 seconds? Would I need to use drop instead of enforce on my
> actions?
postscreen does not wait 6 seconds on all connections; that
would be a terrible mistake.
Wietse
