Forum Discussion
Microsoft Email filtering policies
How can I prevent emails from specific domains going to junk folder.
Specific mailboxes can have mailbox junk settings. That can be done with the Outlook client, or remotely with the Exchange PowerShell commandlet set-MailboxJunkEmailConfiguration "display name" -TrustedSendersAndDomains @{Add="domain.tld"}.
For the whole tenancy or a defined group of recipients, you can have a mail flow rule that sets SCL to -1 though it is advisable to have a second predicate in the rule to prevent the exempted domain from being spoofed. I typically go for defined sender IP ranges, but there are other properties you might use as a double check.
Don't bother with the official advice to put a submission into Microsoft if the sender is persistently drawing a high SCL or you can see other reasons why some would consider the mail spam.
