Re: [exim] SA causing Exim 421 timeout/frozen messages

Bradley Walker wrote:

[many things...]

Very nice, but you told very little about your setup.
How is SA used by Exim? exiscan-acl, router/transport ...?
What is the relevant config?

The main reasons for SA timeouts are:

- scanning of large mails. scanning >200k is mostly useless
- excessive SA ruleset, network test timeouts
- overloaded system

You did also not tell much about your system and your mail volume.
Anyway, there's little Exim can do about SA timeouts (default is 300s,
IIRC), and the version of Exim has surely not anything to do with it.

What you can do on the Exim side to help SA is
- don't scan oversized messages. 200k is a conservative limit, most spam
here is below 16k, largest this month was about 77k.
- filter out as much trash as possible before it hits SA. A virus
scanner (even clamav) can help. And use callouts and/or greylisting on
suspicious stuff.