Blocking inbound senders by domain with a file.

[TULOA]

I am trying to set up a file called blocked_domains.txt.

It contains as an example:
example.com
spammer.com

How can I make Maddy use this?
Unless it seems to be an exact match it doesnt work.

source_in file /from_domains.txt {
reject 550 5.7.1 "Blocked sender domain"
}

Any ideas on this?

There was a discussion for single ones and using regexp in here but I wanted to try to do it from a file.

[TULOA]

I had to do the following:

table.chain domain_blacklist {
    step regexp ".*@(.+)" "$1"
    step file <path>/BlockedDomains.txt
}

That was near the top somewhere.

Then added this to the SMTP source:

smtp tcp://0.0.0.0:25 {
    source_in &domain_blacklist {
        reject 550 5.7.1 "Blocked sender domain"
    }
...
}

Then it will block domains entered in the text file.