To add an address or domain to safe senders:
An address that has been added to safe senders will be pushed to your inbox regardless of your spam filters. Whitelisting a domain or specific email address in is just as easy and works by adding the address or domain in question to a group called Safe senders. You will now receive messages from this sender as normal.Click on the message you wish to view.You can also choose to Star these emails, apply a given label, or mark them as important. Click Create filter to approve the new filter, then mark Never send to Spam to whitelist every email within the filter.
On the other hand, if you’re trying to whitelist every sender from a certain domain, type the domain alone, such as This will tell Gmail to approve every message from a Yahoo sender. To whitelist a single email address, for example, type the entire address.