Is there any way to define black lists for a specific domain?
Like, a file for each user: user1.cf, user2.cf.
And when that user receives email, Mailscanner will check server-wide filter AND domain specific filter.
I am talking about around 80 domains with 8 to 10K mail addresses in them.
And I am planning to start a "FILTER PER ADDRESS" service, which all the address owners can create their own Blacklist for up to 10 senders.
If I use global filter file, it will eventually have 40-50K of lines in it, average.
And Mailscanner will check all the list each time a mail arrives to server.
However, each domain has 50~500 mail accounts. So if I create a global file with like 50 lines, and IF all the users in the most crowded domain will create their blacklist to the fullest, it still makes only 5000 lines for that domain.
So Mailscanner will scan only 5000+50 = 5050 lines.