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Confidence Score Breakdown
- High confidence (90-100%): syntax valid, MX records found, not disposable, not role-based
- Medium confidence (50-89%): valid syntax and MX, but role-based or catch-all domain
- Low confidence (1-49%): valid syntax but risky signals (new domain, no MX, suspicious pattern)
- Invalid (0%): syntax error, domain not found, or known invalid pattern
The Email Validator on TechConverter.me helps you maintain a clean, deliverable email list, reduce bounce rates, and protect your sender reputation — all with instant, multi-level validation for individual addresses or bulk lists.
Examples
Example 1: Syntax Validation
The validator checks that an address follows RFC 5321/5322 rules. Examples of valid and invalid syntax:
user@example.com— validuser.name+tag@example.co.uk— valid (plus addressing and subdomains allowed)user@[192.168.1.1]— valid (IP address domain)user@example— invalid (no TLD)@example.com— invalid (missing local part)user @example.com— invalid (space in local part)user@@example.com— invalid (double @)user..name@example.com— invalid (consecutive dots in local part)
Example 2: Domain and MX Record Validation
A syntactically valid address can still be undeliverable if the domain has no mail servers. The validator performs a DNS lookup:
Email: user@nonexistent-domain-xyz123.com
Result: INVALID
Reason: Domain does not exist (NXDOMAIN)
DNS lookup: no A record, no MX record found
Deliverability: 0% — address cannot receive email
Email: user@website-with-no-email.com
Result: RISKY
Reason: Domain exists but has no MX records
DNS lookup: A record found (website exists), no MX record
Deliverability: low — domain is not configured to receive email
Email: user@gmail.com
Result: VALID
MX records found:
10 alt1.gmail-smtp-in.l.google.com
20 alt2.gmail-smtp-in.l.google.com
Deliverability: high
Example 3: Disposable Email Detection
The validator identifies addresses from temporary email services:
Email: temp123@mailinator.com
Result: DISPOSABLE
Service: Mailinator (known temporary email provider)
Recommendation: reject or flag for manual review
Risk: user likely avoiding real email verification
Email: throwaway@guerrillamail.com
Result: DISPOSABLE
Service: Guerrilla Mail
Recommendation: block if your use case requires real email addresses
Common disposable domains the validator detects include mailinator.com, guerrillamail.com, 10minutemail.com, tempmail.com, throwam.com, and hundreds of others.