Limit sending outside domain or alias

athensguy

Is there any chance to limit users from sending outside domain? for example to set a specific user or group of users from sending to external domains or world and limit them to send only to other accounts on same domain or alias

diekuh

This?

diekuh

That’s part of Rspamd settings maps.

athensguy

diekuh thank you so much. I will check these settings and see if configuration will work. Thanks anyway for your quick response and for your support

diekuh

You are welcome. 🙂

athensguy

diekuh I could not make it per user nor per domain. did not work

diekuh

I use it myself in various installations.

You may want to post what you tried.

athensguy

Thanks again for your reply.

I have one domain with MailCow setup => mymailcowdomain.com
And setup around 30 user/mailbox and what I am planning to do is to limit 20 user to send emails to 2 public domains and internal users only (send to other users on mymailcowdomain.com and if possible send 2 other public domains like publickdomain1.com and publicdomain2.com)

The reset 10 users could send everywhere with no limit.

I have set up this rule using Rspamd

priority = 10;
rcpt = "user1@mymailcowdomain.com";
# Multiple allowed hosts
# from = "/^((?!(.*@allowed-domain\.tld|.*@other-allowed-domain\.tld)).)*$/";
from = "/^((?!.*@mymailcowdomain\.com).)*$/";
apply "default" {
  MAILCOW_BLACK = 9999.0;
}
symbols [
  "MAILCOW_BLACK"
]

user1@mymailcowdomain.com is able to send anywhere and not limited to internal users of mymailcowdomain.com

athensguy

any suggestion?

M31LklK0QTI2UVj7QveoxWiBTjHlwq

Just want to clarify, you want to make it so that some accounts can only send to certain domains, right? If that’s the case, try this:

priority = 10;
from = "user@mymailcowdomain.com";
# Multiple allowed hosts
rcpt = "/^((?!(.*@first-allowed-domain\.tld|.*@second-allowed-domain\.tld)).)*$/";
apply "default" {
  MAILCOW_BLACK = 9999.0;
}
symbols [
  "MAILCOW_BLACK"
]

athensguy

M31LklK0QTI2UVj7QveoxWiBTjHlwq

I have added only two domains
rcpt = "/^((?!(.*@yahoo\.com|.*@gmail\.com)).)*$/";

While user from = "user@mymailcowdomain.com";

still sending everywhere and not restricted to these domains only

M31LklK0QTI2UVj7QveoxWiBTjHlwq

That’s odd. I have tested it myself and was unable to send to other domains whilst using that particular email address. Do you have any other rules? Or do you simply not get MAILCOW_BLACK 9999.0 on the email being sent when you check it on rspamd console?

athensguy

I managed to get it working after limiting only one specific user.

from = “myuser@mydomain.com”;

While it never works if changed regex to prevent all users. If anyone know the expressions to prevent all users it would be highly appreciated.

from = “/^((?!.@mydomain.com).)$/”;
is not working

Ruok2bu

Im having the exact same problem. That syntax does not prevent messages from being sent outside of domain.