All 8 Validation Layers — Explained
Each check adds accuracy. Together they deliver 95%+ validation without needing SMTP.
📝 Layer 1
RFC 5322 Syntax
Full spec validation — character rules, local part length (max 64), total length (max 254), TLD format. Not just a basic regex.
✏️ Layer 2
Typo Detection
Catches 40+ common domain misspellings — gmial.com → gmail.com, hotmial.com → hotmail.com. Suggests the correct domain.
📡 Layer 3
MX Record Lookup
Live DNS query via Cloudflare DoH. Confirms the domain has a working mail server. Eliminates 8–12% of invalid emails that pass syntax checks.
🛡️ Layer 4
SPF Record Check
Confirms the domain has an SPF TXT record. No SPF means the domain is easily spoofable and may be flagged as spam by recipients.
🔐 Layer 5
DMARC Check
Looks up _dmarc.domain TXT record. DMARC tells receivers how to handle unauthenticated mail — missing DMARC is a deliverability red flag.
🗑️ Layer 6
750+ Disposable Domains
Checks against a hardcoded list of 750+ known temporary email providers — Mailinator, YopMail, Guerrilla Mail, Trashmail and hundreds more.
👤 Layer 7
Role Address Detection
Flags info@, admin@, noreply@, support@, sales@ — 60+ role prefixes. Role emails often block marketing emails or go unmonitored.
🕸️ Layer 8
Catch-All Heuristic
Identifies domains likely configured to accept all mail. Unknown MX servers with no SPF record are flagged as probable catch-all domains.
How the 0–100 Score Works
Each email receives a confidence score based on how many checks pass and their weight. The score drives the final verdict.
75–100
Valid
All core checks pass — safe to send
45–74
Risky
Some flags — may bounce or go unread
1–44
Unknown
Cannot confirm — proceed with caution
0
Invalid
Will definitely bounce — do not send
Score breakdown by check
Syntax valid +20
MX record exists +30
SPF record found +15
DMARC record found +10
Not disposable +10
Not role address +8
No typo detected +5
No catch-all signal +5
Disposable detected −15
Typo detected −10
Role address −5
Catch-all suspect −5
Pricing
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✓8 validation layers
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✓0–100 score per email
✓Typo suggestions
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FAQ
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Email validation is just the start — make sure your whole digital presence is clean.