MailTester alternatives
6 tools in the catalogue cover the same ground as MailTester and can replace it depending on the need. Each one is reachable, re-checked daily, and listed with its pricing.
- Burner Email Providers (T)freeCurated list of temporary email service domains with API references and detection library implementations across multiple languages.
- Disposable Email Domains (T)freeCommunity-maintained blocklist of 5,000+ disposable email domains with allowlist support and multi-language implementation examples. Used by PyPI and other projects.
- MailboxValidatorpaidEmail verification API that validates email deliverability, detects catch-all addresses, and provides risk scoring for bulk email list cleaning.
- MailScrapfreemiumEmail verification tool that connects to mail servers to verify mailbox existence and removes disposable email addresses from lists.
- Reacher DemofreeHosted demo of the Reacher email verification API allowing free testing of email validation and deliverability checks online.
- Reacher Github (T)freeOpen-source Rust-based email verification API that checks email deliverability without sending messages, detecting catch-all and disposable addresses.
MailTester
Email Address
Also written Mail Tester
Simple free existence check for an address, useful as a second opinion when another verifier is ambiguous.
RECOMMENDED USE
Getting a second opinion on whether an address exists
Information
Video tutorials
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Suggested workflow
Chain these tools in order for a complete investigation
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Similar tools
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Verify Email
Email AddressFree existence check for an address by querying the mail server, with no message ever sent to the holder.
Emailable
Email AddressEmail verification API that checks deliverability, MX records, and syntax validity for any address. Returns detailed bounce risk and mailbox existence confidence.
MOSINT (T)
Email AddressAutomated email OSINT tool in Go. Consolidates multiple services to investigate a target email: breach checks, social media lookups, domain info. 5.8k GitHub stars.
Reacher Github (T)
Email AddressOpen-source Rust-based email verification API that checks email deliverability without sending messages, detecting catch-all and disposable addresses.
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