Tag: office 365 block sender list

How to block junk or spam in Microsoft 365 from never hitting your inbox or junk folder

| April 16, 2026

How to block junk or spam in Microsoft 365 from never hitting your inbox or junk folder

In Exchange admin in Microsoft 365, you can setup server rules that will block emails so it doesn’t even hit your junk mail. I watch my junk mail folder like a hawk as sometimes my clients emails will go there. But lately, I’ve seen a lot of common words that I will never need to see again ever, such as: Wealth, VOIP, Financials, Million. I mean, maybe one day but not now lol.

So I created some mail flow rules to stop these from coming in to my junk or inbox.

Here is how you can do that:

  • Go to your Exchange Admin Center: https://admin.exchange.microsoft.com
  • Then go to Mail Flow, then Rules (it’s right under)
  • Click on “Add a rule” and “create a new rule”
  • Set the name and conditions you want. I put in a word that works for all “Million”
  • Chose: “Apply this rule if” and then “if the subject or body”  and then the box to the right “if the subject or body includes any of these words”
  • A box will appear and then you can add the words you want filtered to go right to your deleted items.
  • Click “Add” and then “Save”
  • Be sure it’s enabled

Now you can send yourself a test from another email account and see if it appears in the junk or inbox. I’m very careful when considering words that I don’t want to miss but I keep adding new words daily and am finding my junk mail is getting down to less and less. I’m also checking my deleted items on occasion to verify.

I hope that works for you, if you need help with any other 365 Admin tasks, please use the form below to get in contact.