The fastest way depends on which email service you use
Adding an email address to your safe sender list (also called a whitelist or contacts list) tells your email provider to stop filtering that sender's messages into spam or junk. The steps differ between Gmail, Outlook, Yahoo, and other services — there is no single process that works everywhere.
The most reliable method is to add the sender as a contact first, then mark their emails as not spam. This combination signals to your email provider that you trust this person and want their messages to reach your inbox.
Key Takeaways
- Gmail users should add the sender as a contact, then use the "Report not spam" button on a message from that address.
- Outlook and Hotmail users can right-click a message and select "Mark as not junk" or add the sender to their Safe Senders list directly.
- Yahoo Mail users should click the three dots on a message and choose "Not spam" to whitelist that sender.
- Adding someone to your contacts before marking their mail as safe creates a stronger signal than either action alone.
How to whitelist an email in Gmail
Open any email from the sender you want to trust. Click the three vertical dots in the top right corner of the message, then select "Add to Contacts." Gmail will create a new contact entry for that email address.
Next, open another message from the same sender (or go back to the one you just opened). Click the three dots again and select "Report not spam." This tells Gmail's filters that messages from this address belong in your inbox, not in spam. Future emails from that sender should arrive normally.
If you do not have any emails from the sender yet, you can add them manually to your contacts. Click the Google Apps menu (nine dots) in the top right, select "Contacts," then click "Create contact." Enter their email address and save. This does not may provide their messages will reach your inbox, but it makes Gmail less likely to filter them.
How to whitelist an email in Outlook and Hotmail
Open a message from the sender you want to trust. At the top of the message, click "Junk" (or the trash icon), then select "Not junk." A dialog box will appear asking whether you want to add this sender to your Safe Senders list. Click "Yes."
Alternatively, you can add someone to your Safe Senders list before you receive mail from them. Click the "Settings" gear icon in the top right, select "View all Outlook settings," then go to "Mail" and "Junk email." Scroll to "Safe Senders" and enter the email address or domain name you want to trust. Click "Add" and then "Save."
For Hotmail specifically, the process is nearly identical: open a junk message, click "Not junk," and confirm that you want to add the sender to your Safe Senders list.
How to whitelist an email in Yahoo Mail
Open a message from the sender you want to trust. Click the three dots (more options) on the right side of the message header. Select "Not spam" from the menu. Yahoo will move the message to your inbox and add that sender to your whitelist.
You can also manage your whitelist manually. Click the gear icon in the top right, select "Settings," then go to "Filters." Click "Add new filter" and enter the sender's email address in the "From" field. Set the action to "Never send to spam" and save. This prevents Yahoo from filtering future messages from that address.
What to do if the sender's domain is being blocked
Sometimes the problem is not a single email address but an entire domain — for example, all messages from @company.com are going to spam. This often happens with smaller businesses or newly created domains that have not yet built a reputation with email providers.
Add the domain to your safe senders list instead of a single address. In Gmail, add any email from that domain as a contact, then mark their message as not spam. In Outlook, go to Safe Senders and enter the domain name (for example, company.com) rather than a full email address. In Yahoo, use the filter method and enter @company.com in the "From" field.
If messages from an entire domain keep landing in spam even after you whitelist it, ask the sender to check their email setup. They may have configuration problems that cause their mail server to look suspicious to large providers — this is not something you can fix on your end.
Why whitelisting does not always work when ready
Adding someone to your safe sender list does not override all spam filters. Your email provider uses multiple systems to decide whether a message is legitimate: the sender's reputation, the content of the email, whether it contains attachments, and whether it matches patterns associated with phishing or malware.
If a message is flagged by content filters (for example, it contains a suspicious link or attachment), whitelisting the sender may not be enough to get it into your inbox. The email might still land in spam or be held for review. In that case, ask the sender to resend the message without the attachment, or to use a different link format.
Whitelisting also does not prevent your email provider from flagging a message as suspicious — it only tells the system that you trust this sender. You may still see a warning banner on emails from that address if they contain risky content.
How to check whether your whitelist is working
Ask the sender to send you a test email after you have added them to your safe senders list. Check your inbox first, then check your spam or junk folder. If the test message lands in spam, the whitelist did not take effect.
If the message is still going to spam after you have whitelisted the sender, try these steps: make sure you added the correct email address (typos are common), send yourself a test email from that address to confirm it is working, or contact your email provider's support team. Some providers have additional filters that override safe sender lists, and support can help you disable them.
Frequently Asked Questions
Do I have to add someone to my contacts before marking them as safe?
No, but it strengthens the signal. Marking a message as "not spam" alone tells your provider you trust that sender. Adding them to contacts first makes it less likely future messages will be filtered, especially if the sender's domain has a poor reputation.
Will whitelisting stop phishing emails from that address?
No. If someone spoofs or hacks an email address you have whitelisted, their malicious messages may still reach your inbox. Whitelisting means you trust that specific address — it does not protect you if the address is compromised. Always check sender details and links before clicking.
Can I whitelist an entire company or organization?
Yes. Add the domain name (for example, @company.com) to your safe senders list instead of a single email address. This works in Outlook and Yahoo. In Gmail, you can add multiple addresses from that domain as contacts, but there is no built-in way to whitelist an entire domain.
What if I whitelist someone and then want to block them again?
You can remove them from your safe senders list or add them to your blocked senders list. In Gmail, open their message and click the three dots, then "Block." In Outlook, go to Junk settings and add their address to "Blocked Senders." In Yahoo, use filters to send their messages to spam automatically.
Why do emails from a whitelisted sender still show a warning?
Whitelisting prevents filtering, but it does not disable security warnings. If an email contains a suspicious link, attachment, or formatting, your provider may still display a warning banner. This is intentional — it protects you even from senders you trust in case their account has been compromised.