Hi,
When we use Set-SenderFilterConfig BlockedDomains to block domain, exchange will block any messages from that domain without any exception.
The only thing I can think of is transport rule, so please try to create this transport rule to have a test:
If this transport rule doesn't work, then there is no way to block domain not for all mailboxes in organization based on my knowledge.
Best Regards.
You know, I found some commands in PowerShell, for example:
Set-MailboxJunkEmailConfiguration -Identity admin -BlockedSendersAndDomains @{add="postmaster@domain.com")
Set-MailboxJunkEmailConfiguration -Identity admin -BlockedSendersAndDomains @{remove="postmaster@domain.com")
So now I am able to add/remove some e-mails in "blacklist". But: there is a so much time to apply new address, is it normal? It's about 10-15 minutes (!!!) to make changes.
Hi,
I am glad to hear that you can add some emails in the "blacklist".
When a mail rule is created or an existing transport rule is modified or deleted, the change is replicated to all Active Directory domain controllers in the organization. All the Exchange servers in the organization then read the new configuration from the Active Directory servers and apply the new or modified transport rules. So it's depend on the deployment of your environment.
Best Regards.