Free Email Deliverability & Typo Checker
Hard bounces and disposable mailboxes destroy your domain reputation. Major mailbox providers like Gmail and Yahoo enforce immediate throttling and 550 rejections when bounce rates exceed 2%–5%. SadaSend’s sub-50ms verification engine inspects syntax, DNS mail exchangers, disposable domains, and role accounts before mail leaves.
Worked example — alex@example.com
Sample demonstration- PassOverall deliverability
Deliverable · 100/100 Quality ScoreRecipient address is safe for transactional, receipt, and notification sends.
- PassRFC 5322 syntax
Valid mailbox formatStandard username and domain structure conforming to IETF standards.
- PassMX mail exchangers
mail.example.com · LiveDNS MX records resolved with responsive mail servers.
- PassDisposable status
Persistent domainDomain is not present on any temporary or burner registry.
- PassRole-based account
Individual recipientPersonal mailbox rather than a generic distribution list.
Deliverable recipient mailbox with valid DNS mail exchangers and zero spam or burner flags. Safe for transactional dispatch.
SadaSend runs these checks continuously on your sending domains, and refuses to send until they pass — so mail Gmail would reject never leaves.
Start freePredefined Real-World Test Scenarios
Live verification vectorsVerified corporate domain with live DNS MX exchangers and SPF/DKIM authentication.
Double "l" in Gmail detected. Instant autocorrection suggestion provided.
Temporary burner inbox detected on disposable registry to prevent subsequent 550 bounces.
Departmental distribution address detected for deliverability scoring.
What this checks
- RFC 5322 recipient address syntax and mailbox naming structure
- Live DNS MX mail exchanger lookup and server availability
- Screening against 60,000+ known disposable, temporary, and burner domains
- Role distribution account detection (e.g. support@, admin@, billing@)
- Common domain typo auto-detection and correction (e.g. gmaill.com -> gmail.com)
Ready for rock-solid transactional email?
Automated 2048-bit DKIM key rotation, domain-level SPF alignment, and suppression firewalls. Send 6,000 free emails every month with zero credit card required.
Questions
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