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DKIM
Selectors, key rotation, body-hash failures, alignment.
20 guides
Read in order
The three records
SPF, DKIM and DMARC explained in the order they make sense — start here if the acronyms are new.
3 steps
Add a sending platform
Authorise a new ESP without breaking the authentication you already have.
3 steps
Fix a failing sender
Mail is bouncing or landing in spam. Work the causes in order of likelihood.
3 steps
All DKIM guides
How do I set up SPF and DKIM for Customer.io?Set up Customer.io SPF and DKIM with the current sending-domain workflow, account-specific DNS records, DMARC alignment checks, and troubleshooting.
How do I set up SPF and DKIM for Mailchimp?Authenticate a Mailchimp sending domain with the current Entri or manual workflow, two DKIM CNAME records, DMARC, and delivered-message checks.
How do I set up SPF and DKIM for SendGrid?Set up SendGrid SPF and DKIM with Domain Authentication, automated or manual security, account-specific DNS records, and DMARC validation.
What does dkim=fail (body hash did not verify) mean?dkim=fail (body hash did not verify) means the message body changed after it was signed. Here is what breaks the hash and how to fix each cause.
How do I set up SPF and DKIM for Brevo (formerly Sendinblue)?Set up Brevo (ex Sendinblue) email authentication: DKIM CNAME or TXT records, the spf.brevo.com include, DMARC alignment, and fixes for common errors.
How do I set up SPF and DKIM for HubSpot?Set up SPF and DKIM for HubSpot: connect your sending domain, add both hs1/hs2 DKIM CNAMEs and your account-specific SPF include, then verify DMARC.
How Do I Set Up SPF and DKIM for Mailgun?Mailgun SPF and DKIM setup: add the include:mailgun.org TXT record and DKIM key, verify your domain, and keep DMARC alignment on a mg. subdomain.
How Do I Set Up SPF and DKIM for Postmark?Postmark handles SPF via its Return-Path, so skip the include. Real setup: one DKIM TXT record plus a custom Return-Path CNAME for DMARC alignment.
Why do phishing emails pass SPF and DKIM checks?Phishing emails pass SPF and DKIM because authentication proves which domain sent a message, not whether it is honest. Here is what actually stops them.
How do I set up SPF and DKIM for Klaviyo?Set up SPF and DKIM for Klaviyo with a branded sending domain: add the CNAME or NS records, verify, and activate — plus the DMARC step Klaviyo skips.
Will La Poste require SPF, DKIM and DMARC for all senders?La Poste will require SPF, DKIM and DMARC starting September 2025. Here’s what senders must do to keep emails out of spam.
How do I set up SPF and DKIM for Zoho Campaigns?Learn how to configure SPF and DKIM for Zoho Campaigns with Palisade's guide. Follow simple steps to improve email authentication and protect your brand.
How Do I Set Up SPF and DKIM for Amazon SES?Learn how to set up SPF and DKIM in Amazon SES, verify domains, add DNS records, and ensure email authentication passes DMARC.
How can I configure SPF and DKIM for ChargeBee?Learn how to configure SPF and DKIM for ChargeBee with detailed SMTP setup instructions and quick FAQs.
How to Set Up DMARC, SPF, and DKIM on DreamHostDMARC (Domain‑based Message Authentication, Reporting & Conformance) tells receiving mail servers how to handle unauthenticated mail from your domain.
What’s the difference between DKIM and SPF and why does it matter?SPF (Sender Policy Framework) is a path‑based authentication method that checks whether the sending server’s IP address is authorized to use the domain in…
How to manage multiple DKIM records for your domainMost domains send through several services, each needing its own DKIM key. Here's how to manage multiple DKIM records with selectors, rotation, and monitoring.
Why does my DKIM signature fail alignment and how can I fix it?DKIM can verify yet still fail alignment when the signing domain doesn't match your From: address. Here's why it happens and how to fix each cause.
What is DKIM2? The Next Generation of DKIM ExplainedExplore DKIM2, an advanced email authentication protocol preventing spoofing with robust cryptographic signatures.
What is DKIM? DomainKeys Identified Mail ExplainedWhat DKIM is, how the public/private key signature works, the exact DNS record to publish, current key-length guidance, and how it feeds SPF and DMARC.