how to whitelist an email in outlook 365

How to Whitelist an Email in Outlook 365

Outlook 365 is a popular email client used by millions of individuals and businesses around the world. While it offers robust spam filtering capabilities, there may be instances where legitimate emails end up in the spam or junk folder. To ensure that important emails are not missed, it is essential to whitelist specific email addresses or domains in Outlook 365. In this article, we will explore the step-by-step process of whitelisting an email in Outlook 365, along with some best practices and tips to optimize email deliverability.

Understanding Whitelisting

Whitelisting is the process of allowing emails from specific senders or domains to bypass the spam filters and be delivered directly to the inbox. By whitelisting an email address or domain, you are essentially telling Outlook 365 that you trust the sender and want to receive their emails without any interference.

Whitelisting is particularly useful when dealing with newsletters, transactional emails, or emails from trusted contacts that may otherwise be flagged as spam. By following the steps outlined below, you can ensure that important emails are not missed and improve your overall email experience.

Step-by-Step Guide to Whitelisting an Email in Outlook 365

Whitelisting an email in Outlook 365 is a straightforward process that can be done in a few simple steps. Follow the guide below to whitelist an email address or domain:

  1. Open Outlook 365 and log in to your account.
  2. Click on the “Settings” gear icon located in the top-right corner of the screen.
  3. From the dropdown menu, select “View all Outlook settings.”
  4. In the left-hand menu, click on “Junk email.”
  5. Under the “Safe senders and domains” section, click on the “Add” button.
  6. Enter the email address or domain you want to whitelist in the provided field.
  7. Click on the “Add” button to save the changes.
  8. Repeat the process for any additional email addresses or domains you want to whitelist.
  9. Click on the “Save” button to apply the changes.

Once you have completed these steps, any emails from the whitelisted email addresses or domains will be delivered directly to your inbox, bypassing the spam filters.

Best Practices for Whitelisting

While whitelisting can be an effective way to ensure important emails are not missed, it is important to exercise caution and follow best practices to maintain a secure and organized inbox. Here are some best practices to consider when whitelisting emails in Outlook 365:

1. Only whitelist trusted senders:

Whitelisting should be reserved for email addresses or domains that you trust and regularly receive emails from. Avoid whitelisting unknown or suspicious senders, as this can increase the risk of receiving spam or phishing emails.

2. Regularly review and update your whitelist:

As your email communication evolves, it is important to regularly review and update your whitelist. Remove any email addresses or domains that are no longer relevant or trusted, and add new ones as needed.

3. Use caution with bulk whitelisting:

While it may be tempting to whitelist entire domains or large groups of email addresses, it is generally recommended to whitelist specific email addresses whenever possible. Bulk whitelisting can increase the risk of receiving unwanted emails or compromising the security of your inbox.

4. Check the spam folder regularly:

Even with whitelisting in place, it is a good practice to periodically check your spam or junk folder for any legitimate emails that may have been incorrectly flagged. If you find any such emails, mark them as “Not Junk” to help train the spam filters and improve future deliverability.

5. Educate your contacts:

If you frequently receive emails from contacts who are not familiar with whitelisting, consider educating them about the process. Provide them with instructions on how to whitelist your email address to ensure that your emails reach their inbox.

Optimizing Email Deliverability in Outlook 365

Whitelisting is just one aspect of optimizing email deliverability in Outlook 365. To ensure that your emails consistently reach the intended recipients, it is important to follow some additional best practices. Here are some tips to optimize email deliverability:

1. Use a reputable email service provider:

Using a reputable email service provider can significantly improve your email deliverability. These providers have established relationships with major email providers, ensuring that your emails are delivered reliably and securely.

2. Authenticate your email domain:

Authentication is a crucial step in establishing trust with email providers. Implementing SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting, and Conformance) can help verify the authenticity of your emails and improve deliverability.

3. Maintain a healthy sender reputation:

Email providers consider the sender’s reputation when determining whether to deliver an email to the inbox or spam folder. To maintain a healthy sender reputation, avoid sending spammy or irrelevant emails, monitor bounce rates, and promptly handle any complaints or unsubscribe requests.

4. Segment your email list:

Segmenting your email list allows you to send targeted and relevant content to specific groups of subscribers. By sending emails that are tailored to the interests and preferences of your recipients, you can improve engagement and reduce the likelihood of your emails being marked as spam.

5. Monitor email deliverability metrics:

Regularly monitor email deliverability metrics such as open rates, click-through rates, and bounce rates. These metrics can provide valuable insights into the effectiveness of your email campaigns and help identify any deliverability issues that need to be addressed.

Frequently Asked Questions (FAQ)

Q: Can I whitelist an entire domain in Outlook 365?

A: Yes, you can whitelist an entire domain in Outlook 365. By adding the domain to the “Safe senders and domains” list, all emails from that domain will be delivered to your inbox.

Q: Can I whitelist multiple email addresses in Outlook 365?

A: Yes, you can whitelist multiple email addresses in Outlook 365. Simply add each email address to the “Safe senders and domains” list following the steps outlined earlier.

Q: Will whitelisting an email address prevent it from being marked as spam?

A: While whitelisting can improve the chances of an email being delivered to the inbox, it does not guarantee that the email will never be marked as spam. Factors such as email content, sender reputation, and recipient preferences can still influence the spam filtering process.

Q: How often should I review and update my whitelist?

A: It is recommended to review and update your whitelist periodically, especially when your email communication patterns change. Remove any email addresses or domains that are no longer relevant or trusted, and add new ones as needed.


Whitelisting an email in Outlook 365 is a simple yet powerful way to ensure that important emails are not missed. By following the step-by-step guide outlined in this article and implementing best practices for whitelisting and email deliverability, you can optimize your email experience and improve the chances of your emails reaching the intended recipients.

Remember to regularly review and update your whitelist, use caution when whitelisting, and educate your contacts about the process. Additionally, consider implementing other strategies to optimize email deliverability, such as using a reputable email service provider, authenticating your email domain, maintaining a healthy sender reputation, segmenting your email list, and monitoring email deliverability metrics.

By taking these steps, you can ensure that your emails are delivered reliably, securely, and directly to the inbox, enhancing your communication and productivity with Outlook 365.


I am a technology writer specialize in mobile tech and gadgets. I have been covering the mobile industry for over 5 years and have watched the rapid evolution of smartphones and apps. My specialty is smartphone reviews and comparisons. I thoroughly tests each device's hardware, software, camera, battery life, and other key features. I provide in-depth, unbiased reviews to help readers determine which mobile gadgets best fit their needs and budgets.

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