Check your email authentication and uncover issues that could affect delivery.
Clear results for SPF, DKIM and DMARC. Practical guidance on what to fix.
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yourdomain.com
Your sending identities line up.
See what receiving servers see.
Clear checks, without the guesswork.
Practical next steps for your domain.
Create a temporary address, then send one message to it through your usual mailbox or sending service. Keep this tab open to see the authentication and alignment report.
Use the knowledge base to understand the mechanisms, or start with a practical troubleshooting example.
Practical reading ·
Understand the 2026 DMARC specifications, DNS discovery changes and reporting split, with practical steps for checking your sending services.
Read the article : DMARC in 2026: what RFC 9989 changes for email sendersPractical reading ·
A fictional newsletter example shows why passing SPF and DKIM can still leave the visible From domain unauthenticated.
Read the article : SPF and DKIM pass, but DMARC fails. What now?Practical reading ·
Separate authentication evidence from inbox placement, and use the receiving provider’s tools to investigate what happens next.
Read the article : Authentication passes. Why can email still land in spam?Practical reading ·
Inventory your senders, test real messages and keep a before-and-after record when you change email authentication settings.
Read the article : An email authentication checklist for every sending service