Re: [exim] Extremely Simple(?) greylisting with exim?
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|Jeff Lasman at|
|Marc Perkel at|
* server sends message to A (highest MX priority), and is defered due to greylisting. * server now tries to send message to B (lowest MX priority) which always defers. * server notes that B defers in retry database * some time later, it retries A, and it is successful.
* server sends message to A, and is deferred due to greylisting. * server tries B, which defers. it looks in retry database, sees that B hasn't worked for a long time, and BOUNCES THE MESSAGE IMMEDIATELY.
1. A should whitelist all servers which make successful deliveries, and *never* clean the whitelist. as soon as even *one* message is deferred by A, the retry rule for B may hit and cause a bounce. 2. don't use greylisting and "always deferring MX" together. either is fine, but combining them causes weird behaviour. there isn't really any point to it, anyway.
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