Milter-greylist

>>> Filtering on reverse DNS name with three 0-255 numbers sounds therefore
>>> a good idea.
>> Very shortly you will see that there is *lots* of dynamic IP space which
>> will not fit that scheme at all. Or they don't have PTR records at all.
G> If they don't use this scheme, they should certainly use another one (more
G> or less recognizable), as I can't imagine them inventing a nice name for 
G> every address of their dynamic address space.

It  would  be  just  great,  if  greylisting software supports different
settings  for  different  servers.  For  example,  we will be able to do
things such as

acl mylist domain /.*\.client\.comcast\.net/

and  then describe the basic settings (greylist, autowhite, timeout) for
all matched servers in "mylist" acl.

By  the  way,  I would also appreciate "blacklist" possibility to reject
sender completely, it will allow to use only one milter software to both
greylisting and filtering. milter-regex is pretty nice, but actually all
its users I khow mainly do rejects by hosts. In contrast to user-defined
acls,  I  believe  that  milter-greylist  is  almost  ready to introduce
"blacklist" acl. The syntax may be quite similar:
acl blacklist addr X.X.X.X
or  even  "acl blacklist default"  if we are going to receive mails only
from several servers.

Best regards,
Denis Solovyov