Add the address to your contacts
Add the email address that is sending you email (eg email@example.com) to your Gmail Contacts. Google will usually deliver email from addresses that are in your Contacts.
Mark messages as ‘Not spam’
If Gmail has marked emails you wish to whitelist as spam, tell Gmail the emails are not spam.
- In Gmail, navigate to the spam folder.
- Search for emails containing the address or domain you wish to whitelist (eg onlinegroups.net).
- Select all the emails shown.
- Click Not Spam on the toolbar above your emails