DKIM. The dashboard generates the keys; you just publish CNAMEs. Add s1._domainkey.yourdomain.com → s1._domainkey..mail.inbox.onesourcesoft.com. We host the actual public key on our authoritative DNS; you delegate via CNAME.

SPF. Add include:inbox.onesourcesoft.com to your existing SPF record. If you have no SPF record yet, publish v=spf1 include:inbox.onesourcesoft.com -all on your root domain.

DMARC. Start with p=none for monitoring: v=DMARC1; p=none; rua=mailto:dmarc-reports@yourdomain.com. After 30 days of clean reports, move to p=quarantine. After another 30, to p=reject.

Run the dashboard's Verify button after publishing each record. Verification typically takes 5 minutes to propagate.

How to set up DKIM, SPF, and DMARC

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