In GoDaddy, open your domain’s DNS Management, add a TXT record with Name @ and the SPF value (e.g. v=spf1 include:secureserver.net ~all), and save. If an SPF record already exists, edit it rather than adding a second — two SPF records break authentication.
Sign in → My Products → your domain → DNS → Manage Zones. Choose Add, set Type = TXT, Name = @ (the root domain), Value = your SPF string, TTL = 1 hour. Save. If a v=spf1 record is already there, click the pencil to edit that one instead.
Use the includes for every service that sends your mail. GoDaddy’s own mail uses include:secureserver.net; Microsoft 365 uses include:spf.protection.outlook.com; Google uses include:_spf.google.com. Combine them in one record and end with ~all or -all.
Confirm GoDaddy published it:
$ dig TXT yourdomain.com +shortCheck your SPF record now
Open the free SPF checker →You already have an SPF record. Edit the existing one and add your new include to it — never create a second SPF record.
Use @ for the root domain. GoDaddy expands it to your full domain.
