[exim] greylisting builtin to exim?

Has there been any discussion of patching exim to add greylisting support
(so outside programs are not needed)?

I understand that exim can insert mysql (or postgres) records.

But also needed would be a way for Exim to keep time and expire the
greylisted entries. (Or is that already doable?)

Also, it would be interesting to have greylisting within exim so you could
choose when it is used based on the dialog or host.

Until then, an outside tool can expire entries.

Any examples on doing a greylist within exim without SQL server (like a
cdb, dbm, or sqlite)?

It could be useful to integrate greylisting with the great Exim filter.
Maybe something like expiring greylists based on the filter rules.

Jeremy C. Reed

p.s. Anyone using spamd spam deferral daemon and available to review a
chapter I am writing about it?