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Why email goes to spam
Reviewed by the Free Domain Mail editorial team · Updated
Spam placement is usually a combination of authentication, reputation, recipient behaviour and message quality—not one single DNS switch.
Fix the technical baseline
Ensure MX, SPF, DKIM and DMARC are present and valid. A missing record makes trust harder, but a perfect record does not guarantee an inbox.
Use a stable From domain and do not impersonate brands or people.
Send mail recipients expect
Keep subjects accurate, avoid misleading urgency and send only to recipients with a clear reason to receive the message.
Watch permanent bounces, complaints and replies. These are stronger feedback signals than cosmetic wording changes.
Common mistakes to avoid
- Promising inbox placement.
- Buying lists or repeatedly emailing non-engaged recipients.
- Blaming a single word in the subject line when authentication or reputation is failing.
Frequently asked questions
Can a tool tell me if mail will go to spam?
No. Tools can inspect public DNS and highlight risks, not predict a recipient's inbox.
What is the first safe change?
Run Email Health Check and resolve missing SPF, DKIM or DMARC before changing volume.
Technical references
Primary specifications and provider documentation relevant to this guide: