Email Authentication
How to Find Your DKIM Selector and Check the Right Record
Find the DKIM selector in a real email, check the correct DNS record and avoid common lookup mistakes across your sending services.
Read article
The MXValidation blog
Email Authentication
Practical guides to SPF, DKIM, DMARC and BIMI. Learn how email authentication works, check domain alignment and troubleshoot common configuration errors.
Email Authentication
SPF Too Many DNS Lookups: Why It Happens and How to Fix It
Your SPF record can look correct and still fail during evaluation. Learn how the 10-lookup limit works, why nested includes matter, and how to fix the problem safely.
Read article
Email Authentication
SPF and DKIM Pass, but DMARC Fails: Why?
SPF and DKIM can both pass while DMARC fails. Learn why domain alignment matters, how to spot mismatched sender identities and what to change to fix the problem.
Read article