[Gross] graylisting on ip, helo string and domain part of sender

[Natanael Copa]

Hi,

We have an issue with gross and mailing lists. The problem is that
gross greylists on ip, sender email and recepient email. Since the
sender email is often different the emails from mailing lists will
almost always gets grelisted and delayed.

So I'm an interested in generating the hash from ip,
domain_part_of(sender_email) and helo. Now, this is trivial to patch,
but I think this should be a configurable option. So, my question is
how I should implement the config option?

I could either let it be a fixed constant:

hash_by = default
hash_by = alternate

Or I could make it possible to hash by any combination:

hash_by = $chkip $sender $recepient
hash_by = $chkip $sender_domain $helo

Other ideas?

-- 
Natanael Copa