Blocked lists senders

Question

We have a problem where over 30 staff are receiving junk emails.

Seems even though we have an email address on our blocked sender list, these messages are still being delivered to our recipients junk email folder.

How can we make sure the block list is processed before all other rules etc.?

Or, is there something wrong with our config?

E.g: Emmabrown7860@Stuff .com is a blocked listed sender,

How can we make sure these emails are blocked completely?

Answer 1

You can adjust the anti-spam settings to send to the quarantine or delete rather then the junk mail folder.
https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/configure-your-spam-filter-policies?view=o365-worldwide

Specifically:

https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/configure-your-spam-filter-policies?view=o365-worldwide#use-the-security--compliance-center-to-create-anti-spam-policies

https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/create-block-sender-lists-in-office-365?view=o365-worldwide#use-blocked-sender-lists-or-blocked-domain-lists

When multiple users are affected, the scope is wider, so the next best option is blocked sender lists or blocked domain lists in anti-spam policies. Messages from senders on the lists are marked as Spam, and the action that you've configured for the Spam filter verdict is taken on the message.

Answer 2

As AD-7937 said, you could modify the setting to delete junk email rather than deliver to mailbox junk folder:

You can also add this email address as a "mail contact" in Exchange admin center, then use a transport rule to delete emails which sent from this email address directly:

Answer 3

We have lots of email IDs to block, is there any way to add just block email IDs, instead of add them as "mail Contact''

Answer 4

You dont have to add them as a mail contact. I wouldn't do that at all.
Create the rule to block by sender

Create a mail flow rule that blocks based "sender Address includes" and put in the SMTP address of the sender you want to block.