Software & Apps MS Office How to Add an Address or Domain to Safe Senders in Outlook An easy way to improve Outlook's spam filtering By Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated January 31, 2020 MS Office Outlook Word Excel Powerpoint Tweet Share Email One way to help Outlook achieve better spam filtering accuracy is by adding known senders to its list of safe senders. This makes sure email from these senders goes to your Outlook Inbox, no matter what the junk mail algorithm directs. The Safe Senders List overrides the Outlook standard spam detection filters. You can also whitelist complete domains using the Safe Senders List. Instructions in this article apply to Outlook 2019, Outlook 2016, Outlook 2013, and Outlook for Office 365. Add an Address or Domain to Safe Senders in Outlook To add an address or domain to the Safe Senders list in Outlook: Go to the Home tab. In the Delete group, select Junk. Select Junk E-mail Options. In the Junk Email Options dialog box, go to the Safe Senders tab. Select Add. In the Add address or domain dialog box, enter the email address or domain name you want to whitelist. For example, firstname.lastname@example.org or @example.com. Select OK. The email address or domain appears in the Safe Senders List. Select OK. Add an Address From an Email to the Safe Senders List If you have a message from a sender you want to add to the Safe Senders List in your Outlook Inbox (or the Junk E-mail folder), select the message to add the sender to the list. Select a message from the sender you want to add to the Safe Senders List, then go to the Home tab. In the Delete group, select Junk. Select Never Block Sender. In the confirmation dialog box, select OK.