How to make an account send emails to just one specific email?

gabriel_gomes

firstly I would like to thank you guys for the amazing software. 😄

I have an email that I use to send backup reports of an app, and the email is sent to the same account, how can I block this account from sending emails to any other email than the one I specified, inside and outside the domain, in case it gets compromised?

p0wer

for sending, just authenticate with user and pass.
for recieving, goto admin panel, filters and create a sieve rule

examples can be read here:
https://support.tigertech.net/sieve

gabriel_gomes

p0wer thank you for the fast reply, where can I find the authenticate with user and pass? The only thing I could find was the app passwords for imap and smtp login.

gabriel_gomes

After asking in the telegram group, It was suggested to create Rspamd settings map. So I created two Rspamd settings map rules, one with higher priority, to allow that mailbox to send to itself and one with lower to block it from sending it to other emails and domains.

priority = 1;
from = “internal.email@domain”;
from = “internal.email@sub.domain”;
rcpt=“/.*/”;
apply “default” {
MAILCOW_BLACK = 999.0;
}
symbols [
“MAILCOW_BLACK”
]

priority = 2;
from = “internal.email@domain”;
from = "internal.email@sub.domain;
rcpt=“internal.email@domain”;
rcpt=“internal.email@sub.domain”;
apply “default” {
MAILCOW_BLACK = null;
}
symbols [
“MAILCOW_BLACK”
]