Authorize senders with SPF
Identify spam messages with SPF records
You can easily identify spam messages with Sender Policy Framework (SPF) records for your domain. An SPF record is a type of Domain Name Service (DNS) record that identifies which mail servers are permitted to send email on behalf of your domain.
If your domain doesn’t have an SPF record, some recipient domains may reject messages from your users because they can’t validate that the messages come from an authorized mail server.
If you've already set the SPF record for your domain, it means that you’ve set Google's servers in the SPF records.
- If you purchased your domain from one of our registration partners while signing up for Google Apps, Google doesn’t publish SPF records for your domain.
- If you have an existing SPF record, you can update it to authorize an additional mail server. Be careful not to create multiple SPF records; only update the existing record.
- Multiple SPF records aren’t recommended and can cause authorization problems. See Multiple SPF records for more information.