Make Sure You Get Those Emails: Whitelist Email Addresses in Microsoft Office 365

By December 27, 2017September 16th, 2020Blog, Exchange, Microsoft, Office 365, Office 365
whitelist email office 365 exchange

UPDATED: 7/22/2019

Sometimes Exchange can be a little overzealous in protecting you from spam and other unwanted email. To make sure messages get through, you can whitelist email addresses in Office 365.

We get this question a lot from IT Pros and people just getting started in the Office 365 Admin center. The first set of instructions is for the pros–no fluff. Use the second set of instructions for a few more details.

How to Whitelist Email Address in Office 365

  1. Open the Exchange Admin Center.
  2. Click on Protection.
  3. Click on Spam Filter.
  4. Double click on Default.
  5. Click on Allow Lists.
  6. Under Allow Lists, click the + to add a new email address.
  7. In the window that pops up, add the address you’d like to let through.
  8. Click Save.
  9. Click Save again.

That’s it! Now email from that address will be delivered to your organization’s inboxes, not marked as junk.

More Detailed Instructions for Whitelisting Emails

  1. Sign into Office 365: Go to https://portal.office.com and sign in.
  2. Click on Admin from your list of apps.
    Office 365 Admin Center
  3. In the left-hand column, click on the Admin Center icon, then click Exchange to open the Exchange Admin Center.
    Click on Exchange Admin Center
  4. Click on Protection from the left-hand menu.
    Exchange Admin Center Protection
  5. Click on Spam Filter.
    Spam filter
  6. Double-click on Default.
    default spam filter in exchange admin center
  7. In the pop-up window, click on Allow Lists.
    allow lists to whitelist Office 365 emails
  8. Under Allowed Sender or Allowed Domain, click the + to add a new email address. Be careful about allowing whole domains, as entering popular domains here like gmail.com can allow bad actors to bypass filtering.
  9. In the window that pops up, add the address you’d like to let through.
    add email to whitelist in office 365
  10. Click OK.
  11. Click Save.

That’s it! Now email from that address will be delivered to your organization’s inboxes, not marked as junk.

Jeff Kirvin, PEI

8 Comments

Leave a Reply to Dharshana Cancel Reply