MailSlurp resources
#Email Authentication
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What Is BIMI? How Brand Indicators Work and What You Need Before Rollout
Learn what BIMI is, how it connects brand logos to authenticated email, which DNS and DMARC prerequisites matter, and what results to expect in real inboxes.
Read moretechnicalWhat Is a DKIM Selector? Why It Exists and How To Troubleshoot It
Learn what a DKIM selector is, how mail receivers use it to find public keys, and how to rotate or troubleshoot selectors without breaking delivery.
Read moretechnicalOffice 365 DKIM Setup: Enable DKIM in Microsoft 365 Without Guessing the CNAMEs
Set up DKIM for Office 365 and Microsoft 365 custom domains without copying stale examples. Learn where Microsoft exposes the required CNAMEs, how selectors work, and how to verify live signing.
Read moretechnicalGoogle Workspace DMARC: Setup, Alignment, and Safe Rollout for Gmail Senders
Set up Google Workspace DMARC without treating it like a standalone TXT record. Learn how Gmail sender requirements, SPF, DKIM, alignment, and gradual enforcement fit together.
Read moretechnicalGoogle Workspace DKIM Setup: Generate the TXT Record, Turn It On, and Verify It
Set up Google Workspace DKIM without guessing. Learn how to generate the record in the Admin console, publish the TXT value, turn on signing, and verify real Gmail headers.
Read moretechnicalGoDaddy DMARC Setup: Add the Record, Avoid DNS Mistakes, and Verify It Works
Set up DMARC in GoDaddy without guesswork. Learn which host to use, what the TXT record should look like, how to avoid duplicate records, and how to verify the policy before it affects live mail.
Read moretechnicalDMARC Reject: What Happens, Why Legitimate Mail Gets Blocked, and How To Roll It Out Safely
Learn what DMARC reject means, how receivers handle failing mail under reject policy, and how to avoid blocking legitimate messages during enforcement.
Read moretechnicalDMARC Fail: What It Means, Common Causes, and How To Fix It
Understand what a DMARC fail result actually means, why SPF or DKIM can pass while DMARC still fails, and how to troubleshoot alignment without guessing.
Read moretechnicalSPF Checker: How to Validate SPF Records and Fix Common Failures
Learn how to use an SPF checker to validate SPF records, inspect include chains, fix multiple-record problems, and troubleshoot sender authorization failures.
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