Milter-greylist

Hi,

When I first implemented milter-greylist (two days ago) the following day I
received complaints of emails not being receivied for many hours.

I tracked this down to the remote smtp servers having different IP's (mail
server farms) so to resolve the issue I included the option:

subnetmatch /24

which seems to have resolved the issue for many of the larger mail farm sites.

This works for providers that have all their smtp servers on the same /24
subnet, what can I do for the ones that don't?

Also, I have this at the bottom of my greylist.conf file:

acl greylist default delay 5m autowhite 14d

Does anyone see any problems with this?

Lastly, I have some greylisted email currently on hold (for the past couple of
hours it seems) and I've just whitelisted the rcpt with:

acl whitelist rcpt /.*@.*mydomain.org/

so greylisting won't be done for their domain.

What can I do to get the greylist server to "release" anything it has on hold
for that " /.*@.*mydomain.org/ " domain?

Thanks.

Michael.