It appears that Mike Hillyer via mailop <m...@mikehillyer.com> said:
>There is nothing broken about it, any large-scale sending environment has 
>pools of IP addresses for deliveries, and when a message comes
>out of the delayed queue it is typically loaded back into the pool, where it 
>is randomly assigned to an IP for its delivery attempt.

Right.  In my greylister I accept any retry from the same /24 which seems to 
work well enough.

Anyone who expects retries from the identical IP doesn't have a very
clear idea about how large mail systems work.

R's,
John
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