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. 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.