Spam Content Checker
Check a subject line and email body for common content patterns that can hurt trust, compliance, or deliverability. This is a lightweight preflight check, not an inbox-placement guarantee.
Content score
100
Low risk
No obvious spam-content issues found.
Recommendations
What to improve first
- Use specific subject lines that match the body content.
- Keep promotional language factual and avoid repeated urgency.
- Include plain text context around links and calls to action.
- Add unsubscribe or preference language for bulk email.
Spam checks are a preflight, not a promise.
Content is only one part of deliverability, but obvious problems are still worth catching early. This checker focuses on issues a developer or marketer can fix before sending a campaign or lifecycle email.
Trust signals
Clear subject lines and plain text context make messages easier for people and filters to evaluate.
Compliance basics
Bulk email needs unsubscribe or preference-management language.
Link hygiene
Too many links and repeated urgency can make useful email look low quality.
Spam checker questions.
Can a spam checker guarantee inbox placement?
No. Inbox placement depends on authentication, sending history, list quality, recipient engagement, and provider-specific filtering. This checker only highlights common content and compliance risks.
Do you send my email content to a server?
No. The spam content checker runs in your browser and does not upload the subject line or body to SMTPfast.
What should I fix first?
Start with missing unsubscribe language for bulk email, all-caps subject lines, excessive punctuation, too many links, and vague promotional phrases.
Send with delivery feedback
SMTPfast shows accepted, delivered, bounced, and suppressed messages so content checks become part of a real delivery workflow.
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