ColdFusion cfmail SPF, DKIM, and DMARC Setup: Stop Your Emails Landing in Spam

If your messages are landing in spam, the fix is almost never in your ColdFusion code — it's in your DNS records and your sending mail server. Email authentication (SPF, DKIM, DMARC) happens at the domain and mail-server layer, not inside CFML. simply hands your message to an SMTP server (configured in the ColdFusion Administrator or on the tag); that SMTP server — and the DNS records for your From domain — are what receiving servers like Gmail and Outlook actually check. To stop the spam-foldering you need three DNS TXT records for your sending domain: SPF (lists which servers are allowed to send for your domain), DKIM (cryptographically signs your mail so it can't be forged or tampered with), and DMARC (tells receivers what to do when SPF/DKIM fail, and sends you reports). Then you make sure the From address in your matches the authenticated domain and that ColdFusion relays through a server covered by those records. This guide shows exactly how the three records work, the record syntax, how to wire and the CF Administrator so mail is sent from an authenticated domain, and the verification steps — all grounded in how the standards actually operate.
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