Sending emails only to internal domains except allowed domains

mailcow-helper

Hello,

Apologies for my newbie question. I searched in forum but could not find the answer so requesting in new discussion.

I would like some users to restrict email delivery outside of internal domains as well as I can define some domain names or specific email IDs where they can only send emails.

If anyone has some guidance on it… pls guide.

mailcow-helper

I tried with some combined map in RSPAMD like below:

restricted_local_senders {
  type = "combined";
  prefilter = true;
  regexp = true;
  action = "reject";
  rules {
    user {
      map = "/etc/rspamd/override.d/local_restricted_users.map";
      selector = "user";
    }
    rcpt = {
      map = "/etc/rspamd/override.d/allowed_domains_restricted_users.map";
      selector = "rcpts:domain";
    }
  }
  expression = "user & rcpt"
}

local_restricted_users.map contains internal user Email IDs and allowed_domains_restricted_users.map contains domains.

Well as Action is REJECT currently it is working fine.

Just want to know how can I make it reverse… like instead of reject it only allows sending of emails to specified domains. (Changing action to “accept” opens everything.)

Also raised the same query to rspamd if anyone helps (https://github.com/rspamd/rspamd/discussions/4407)

mailcow-helper

Here is a working multimap if anyone wants to achieve it.

restricted_local_senders { type = "combined"; prefilter = true; regexp = true; action = "reject"; rules { user { map = "/etc/rspamd/override.d/local_restricted_users.map"; selector = "user"; } rcpt = { map = "/etc/rspamd/override.d/allowed_domains_restricted_users.map"; selector = "rcpts:domain"; } } expression = "user & !rcpt" }