How To Whitelist an Email in Office 365

Try these different approaches to whitelist an email

by Loredana Harsana
Loredana Harsana
Loredana Harsana
Managing Editor
Loredana is a passionate writer with a keen interest in PC software and technology. She started off writing about mobile phones back when Samsung Galaxy S II was... read more
Reviewed by Alex Serban
Alex Serban
Alex Serban
Windows Server & Networking Expert
After moving away from the corporate work-style, Alex has found rewards in a lifestyle of constant analysis, team coordination and pestering his colleagues. Holding an MCSA Windows Server... read more
Affiliate Disclosure
  • It's recommended to use the mail flow rule to whitelist your emails to ensure maximum security.
  • Whitelisting emails using Office 365 defender prevents Microsoft from making necessary security check-ins.
  • Attackers can spoof email addresses if you don't whitelist email addresses using the Mail Flow rule.
how to whitelist an email in office 365

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While using your mailing application, there are certain senders you’d like to give priority in your inbox to ensure that their emails get delivered to your Inbox.You’d need to Whitelist such email addresses using Office 365. If you’d like to know how to Whitelist an Email in Office 365, this article provides all the necessary steps to help achieve this.

In this article

What is a whitelist in office 365?

The term Whitelist means telling your Email provider that you trust the person sending you the email. It means you approve of the sender’s message being delivered to your Inbox at any time.

When Emails addresses are whitelisted, it prevents emails from landing in the Spam or Junk folders and instead shoots them to the top of your priority Inbox.

How do I whitelist an email in office 365?

There are two ways to whitelist an email address in Office 365; Mail Flow Rule and Microsoft 365 Defender. You can utilize both methods to whitelist email addresses.

However, only one of those methods is recommended i.e, the Mail Flow Rule. This is because it is more secure than using Microsoft 365 Defender to Whitelist the email.

1. Whitelisting Emails using the Mail Flow rule

  1. Press the Windows key + S, type in Office 365, and hit Enter.
  2. Navigate to the Exchange Admin Center and click Mail Flow.
  3. Click on Rules, and click the Plus icon to add a new rule for Bypass Spam Filtering.
  4. Select The Sender, and click on Is This Person under the Apply This Rule If drop-down list.
  5. Then, type in the correct email address, and click on the Check Names button to move the email address to Add Field.
  6. Click on the OK button, and close the window.
  7. In the Do the Following Field, the option of Set the spam confidence level (SCL) to Bypass Spam Filtering should be automatically selected.
  8. Click the Save button to save and apply your changes

Whitelisting emails using the Mail Flow Rule ensures maximum security. With the Mail Flow Rule, all the security check-ins e.g SDF and DMARC are carried out.

2. Use Office 365 Defender

  1. Press Windows key + S, type in Microsoft 365 Defender, and hit Enter.
  2. Then, click on Policies and Rules and select Choose Threat Policies.
  3. Open the Anti Spam Policies menu, scroll through the list, and click on Edit allowed and blocked senders and domains.
  4. Under the Allowed tab, click Manage Senders, and select Add Senders to add a new sender to the list.
  5. Click on Done, and click Save to apply your changes.

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After making these changes, Emails from the sender are now excluded from the Spam Filter and should automatically be delivered to your main Inbox.

How do I add an email to the Safe Senders’ list office 365 admin center

There is a slight difference between whitelisting an email address and adding an email to the Safe Senders’ list. In Office 365, messages from email addresses in the Safe Senders list are never considered junk mail.

The following ways to add an Email address to the Safe Senders’ list:

  1. Type in Office 365 in the Windows search bar and hit Enter.
  2. On the Home tab, select Junk and click on Junk Email Options.
  3. On the Safe Senders tab, check the option to Automatically add people in e-mail to the Safe Senders List.
  4. Close Office 365.

Once you’re done, the selected email address should be added to the Safe Sender’s list. At this point, you will receive the mail no matter the content of the message.

Sometimes, even after adding an email address to the safe sender list, the email content of the message might be blocked. You can resolve this by reading our guide.

Whitelisting an email address in Office 365 is one of the surest ways to ensure the delivery of priority messages to your Inbox and not filtered as Spam.

You can whitelist emails using any of the two techniques we’ve highlighted. However, it’d be better to use the mail flow rule to ensure maximum security.

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