Good morning (or evening as the case may be!) I have a small issue. I currently have an ACL: https://ghostbin.com/paste/s727x in where I do my dns blacklist checks. I have a whitelist for domains that should make it through, and one for domain that are recipients should allow all mail through.
Problem is, my whitelist for senders doesn't appear to work very well. I have comcast.net as a line entry in the file that is specified as a "hostlist", yet emails from comcast.net are still sometimes being blocked. How can I strengthen this detection that I -really- do want those emails to make it through?
I could go by IP, but... lots of the big name senders use a plethora of sending IPs.