SPF helps prevent your outgoing email from being marked as spam by receiving email servers. Set up SPF by adding an SPF DNS TXT record (SPF record) to your domain.

An SPF record is a line of text that you add to your domain, following your domain provider’s instructions. The line of text uses special syntax and lists all the servers that send email for your domain. Here’s an example SPF record:

v=spf1 include:_spf.google.com ~all

When receiving servers get email messages from your domain, they check the SPF record to verify that the messages came from authorized servers.