Fix guides
DMARC Alignment Fixes by Email Provider
Your ESP changed Return-Path or DKIM domain and DMARC went red. Pick your provider — we list the CNAMEs and clicks in order.
SendGrid
CNAME branding and alignment for SendGrid.
Mailgun
DNS records for Mailgun sending alignment.
Google Workspace
Alignment with Google-hosted mail.
Microsoft 365
Selector CNAMEs and M365 DMARC.
Mailchimp
Transactional and marketing alignment.
Klaviyo
Klaviyo sender domain setup.
HubSpot
HubSpot email sending alignment.
Postmark
DKIM and return-path for Postmark.
Amazon SES
Easy DKIM and custom MAIL FROM.
Brevo
Brevo (Sendinblue) domain auth.
Zoho Mail
Zoho DNS and alignment.
Fastmail
Fastmail-hosted domain alignment.
Proofpoint
Gateway and relay alignment.
Mimecast
Mimecast DNS and DMARC.
SparkPost
SparkPost sending alignment.
How to use these guides
Step 1 Open the guide that matches your email provider or gateway.
Step 2 Complete each DNS step in order at your DNS host.
Step 3 Run DNS Preflight to confirm DKIM, SPF, and DMARC alignment.