Forum Discussion
Open Specific External Domain for sending to blocked DLs
Hi DrFMS,
1) could you please explain in details how can you do that:
"via a Transport Rule that targets the specific DLs" ?
2) > Is there a way, in Exchange Online, to tag a specific external domain (without adding it as an Accepted >domain) as "Internal", so it can send to these blocked DLs?
No way to tag as far as I know.
The only way I see is using of combination of a transport rule and a custom Power Automate flow.
Victor_Ivanidze The Transport Rule method we're using is basically this:
Apply this rule if - The To or CC box contains... <all of the targeted DLs>
Do the following... Reject the message with the explanation... <This is an Internal Distribution List>
Except if... The sender's domain is ... <specified domain - primary domain of o365 Tenant>
Hi DrFMS,
ok, understood.
Q1. do you have the DLs that should behave differently? In other words, can I assume that each your DL should reject external messages with exceptions?
Q2. if the list of external domains that can deliver to your DLs is the same for all DLs or different DLs have different lists of exceptions?
Hi, Victor_Ivanidze
For the DLs, in question, they are blocked from receiving email from External domains. The External domain that we want to allow is from a single tenant.
