Build a correct SPF record for your domain using the mxio SPF Builder. Select your email providers, set your policy, and publish with confidence.

Learn what managed email authentication means, why DNS-based email security requires ongoing management, and how platforms like mxio handle SPF, DKIM, and DMARC so you don't have to.

Having more than one SPF TXT record on a domain causes both to fail. Learn how to detect duplicate SPF records and merge them correctly.

SPF flattening resolves include mechanisms to IP addresses, reducing DNS lookups. Learn how it works, the risks of manual flattening, and when you need automated flattening.