Forum Discussion
Our mail domain isn't safe by default for Exchange Online users
Hello all,
Our PR Team requested to force automatic download of pictures for internal letters that are sent by the team. We decide to use GP setting "Automatically download content for e-mail from people in Safe Senders and Safe Recipients Lists" from Office an administrative template.
It works fine for users with on-prem mailboxes because our mail domain is in the Safe Senders by default, but it doesn't work for users with mailboxes in Exchange Online.
For EO mailboxes, pictures of internal letters are not downloaded automatically in classic Outlook. They have to add "@<our mail domain" to Safe Senders list to download pictures automatically. Any attempts to add the same domain by using Set-MailboxJunkEmailConfiguration fail because "the domain is the default mail domain"! (And should be treated as safe).
Headers show that letters are not "Anonymous" but internal.
It looks like a bug, or we missed something in our Hybrid configuration.
Any ideas?
King regards,
Dmitry Horushin
1 Reply
Yeah, this is a known gap between on-prem and Exchange Online. In EXO, your own domain isn't automatically treated as "safe Sender" the same way it is on prem, which is why the GP setting doesn't behave consistently.
Test :
1. Add your PR team's distribution address or specific sender addresses to the safe senders list via policy, instead of the whole domain.
