Run a complete spam test on your email before launching a campaign: check your sending domain’s live SPF, DMARC, MX, and 6 DNSBL blacklists alongside 220+ subject & body spam trigger phrases in one click.
Instant 0-credit pre-scan (duplicates, typos, disposables, roles) + live 5-email Smart SMTP sample check for Free Email Spam Checker — Test Spam Score, Words & Domain Reputation | KaijuVerifier. Unlock 5,000 credits for $19 (never expire).
Our Email Spam Checker combines two real-time engines: (1) a live DNS & reputation audit of your sending domain (checking SPF, DMARC policy, MX records, and 6 major DNSBL blacklists like Spamhaus and SpamCop), and (2) a lexical spam-filter scanner that tests your subject line and email body against 220+ spam trigger words, ALL-CAPS ratios, and phishing heuristics.
Aim for a Composite Deliverability & Spam Score of 80/100 or higher, zero DNSBL blacklist hits, an active DMARC policy (p=quarantine or p=reject), and zero high-risk financial or urgency trigger words in your subject line.
If your recipient list contains more than 1.5%–2% invalid addresses that hard-bounce (SMTP 550), Gmail, Microsoft 365, and Yahoo automatically downgrade your domain reputation. Always clean your recipient CSV or .XLSX list below before sending.
Our Pre-Flight Email Spam Checker: Auth, DNSBL & Lexical Audit is built around Combined Rspamd Content + SPF/DKIM/DMARC Inspector, focused on Testing both message copy and domain authentication before launch. Every check runs across our 7 distributed verification clusters with full TLS 1.3 security and zero data retention.
Unlike generic bulk tools that charge for duplicate rows or inconclusive timeouts, this workflow combines browser-native pre-scanning ($0 cost for duplicates and syntax errors) with live 7-Layer Smart SMTP verification starting at $19 for 5,000 non-expiring credits.
| Technical Dimension | Specification (Combined Rspamd Content + SPF/DKIM/DMARC Inspector) | Operational Outcome |
|---|---|---|
| Primary Architecture | Combined Rspamd Content + SPF/DKIM/DMARC Inspector | Testing both message copy and domain authentication before launch |
| Accuracy & Unknown Policy | 99.7% Definitive SMTP Precision | $0 charged for Unknown, Greylisted, or Duplicate rows |
| Supported Formats & API | CSV, TXT, .XLS, Multi-Sheet .XLSX & REST API | 100 free monthly checks + non-expiring Pay-As-You-Go packs |