> From: "Vincent C. Immler"
> with multiple sender IPs for the same sender address, the same sender will
> be greylisted again, when sending from a different IP (e.g. Google).
>
> As far as I know, there is no solution for that problem.
A solution: use only first three bytes of the IPv4 address,
and whitelist few senders which can resend a letter from other
IP-addresses in a block larger than /24.
I.e. use ${sg{$sender_host_address}{\N\.\d+$\N}{}}
for greylisting instead of $sender_host_address .
I attached excerpts from my config (including the whitelist) to
http://wiki.exim.org/DbLessGreyListingC
