Milter-greylist

Hi,

I receive major greylist delays for emails from baseplan.com, 76 hours is normal.

I'm going to have to whitelist them in the milter, but if I wanted to avoid
whitelisting how would I best go about it?

Their MX servers are:

5  mail.baseplan.com  203.36.46.168
10 mail1.no-ip.com    204.16.252.100
15 mail2.no-ip.com    69.65.19.120 and 69.65.19.121

In my greylist.conf file I do have:

subnetmatch /24

to handle mail farms from the same subnet, but obviously the above will not
work for that.

What do people suggest is the best way to handle this without whitelisting?

Thanks.

Michael.