In order to use a custom domain, Office 365 requires that you add a Sender Policy Framework (SPF) TXT record to your DNS record to help prevent spoofing. For detailed information about other syntax options, see SPF TXT record syntax for Microsoft 365. For example, the company MailChimp has set up .įigure out what enforcement rule you want to use for your SPF TXT record. Some bulk mail providers have set up subdomains to use for their customers. For example, 131.107.2.200.ĭomain names to use for all third-party domains that you need to include in your SPF TXT record. Go to your messaging server(s) and find out the External IP addresses (needed from all on-premises messaging servers). For instructions, see Gather the information you need to create Office 365 DNS records. The SPF TXT record for your custom domain, if one exists. You need some information to make the record. The SPF TXT record for Office 365 will be made in external DNS for any custom domains or subdomains. If you don't use a custom URL (and the URL used for Office 365 ends in ), SPF has already been set up for you in the Office 365 service. GoDaddy, Bluehost, web.com) & ask for help with DNS configuration of SPF (and any other email authentication method).
If you are a small business, or are unfamiliar with IP addresses or DNS configuration, call your Internet domain registrar (ex.
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