TXT records store free‑form text and are used for SPF, DMARC, DKIM, and domain verification. Long TXT values may be split into chunks by DNS servers, but the content is still valid when combined.
Email authentication relies on TXT. Use the TXT lookup online tool to see published values. For sender policy, check the SPF check and DMARC check.
_dmarc).Run the TXT lookup, then validate email records together with the Email DNS Check. If you are unsure which record is correct, compare results across resolvers or use the DNS propagation check.
TXT works alongside MX and SPF. For aliasing, see the CNAME guide.