On Wed, Dec 02, 2015 at 12:49:05PM -0500, Bill Cole wrote: > Alternative (and I think better) random guess: you've enabled one or more > "after 220 server greeting" test. See the postscreen man page for the > consequences of such configuration and note that there's no law requiring > retry delivery of a deferred message to be done via the same IP as any prior > delivery attempt, and a big complex mail system built for high availability > is likely to NOT do so.
We do make use of those. However, we are also using postscreen_dnsbl_whitelist_threshold. The hosts in question are scoring in the negative numbers and SHOULD be exempt from the after 220 greeting tests. As mentioned in my first email, the host in question is scoring -8. I'm whitelisting any host that scores below -2. -Bryan -- Bryan K. Walton 319-337-3877 Linux Systems Administrator Leepfrog Technologies, Inc
