Emails are not getting delivered.

Question

We are sending emails from service now and those emails are not getting delivered to DLs, because they are considered as external emails. We have a setting on Dl's not to receive emails from outside and that we cannot change due to security policies. What we can do to allow those emails in DL's without changing the settings of DL's.

We have 300 Dl's, so it is not feasible to make 300 mailboxes and forwards their email to respective Dl's.

It is a separate email going to separate DL's, we are not sending a same email to all 300 Dl's.

Answer 1

You wont be able to allow those external senders unless you can somehow authenticate the connection from Service Now. You would need to ask them if they have any solutions, but that would not be something they would typically have a way to fix neither.

otherwise, allow external senders to those groups and then create transport rules that drop any external message sent them unless its from Service Now.

Answer 2

550 5.4.1 Recipient address rejected: Access denied. [DB1PEPF000509FD.eurprd03.prod.outlook.com 2024-05-29T11:44:45.570Z 08DC7F6243F6391D