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MailTooth
What it is
MailTooth verifies individual email addresses and lists, returning evidence for safe, risky, or invalid results. Its dashboard accepts CSV or TXT uploads, lets users choose an email column and verification depth, and provides downloadable results. Quick checks use 0.5 credit, Standard checks use 1 credit, and Deepcheck uses 2 credits. Depending on depth, checks can examine syntax, MX and domain signals, disposable or role-based addresses, SPF, DKIM, DMARC, blocklists, WHOIS, SMTP mailbox status, and catch-all behavior. Single-address and bulk APIs support programmatic verification. A one-line JavaScript integration checks form fields before submission with configurable blocking rules. The Chrome side panel can discover and verify addresses while browsing, save results to lists, or export CSV. Workspaces provide owner, admin, member, and viewer roles. Resend connections support campaigns, and a remote MCP tool verifies one address per call. Paid credit packs are one-time purchases, starting at $11.
For and against
For
- Checks addresses at three verification depths
- Supports CSV and TXT bulk uploads
- Offers single-address and bulk APIs
- Chrome extension saves or exports results
- Credits never expire on paid packs
Against
- MCP verification handles one email per call
- Large datasets are directed to bulk verification
- Paid packs start at $11
- Verification data is retained as reasonably necessary
The verdict
MailTooth combines layered email checks with dashboard, API, browser, form, and campaign workflows. Its credit model lets users choose verification depth and buy one-time packs for larger workloads.
Who it suits
MailTooth suits teams checking individual addresses, uploaded lists, forms, campaigns, or browser-discovered contacts. It is relevant when API, bulk dashboard, extension, or workspace access matters.
Plans and prices
Free credits
100 credits · up to 200 Quick checks, 100 Standard checks, or 50 Deepchecks · no card required
Read 11 Oct 2026 · mailtooth.com
Starter
3,600 credits · 7,200 Quick checks · 3,600 Standard checks · 1,800 Deepchecks
Read 11 Oct 2026 · mailtooth.com
Growth
10,200 credits · 20,400 Quick checks · 10,200 Standard checks · 5,100 Deepchecks
Read 11 Oct 2026 · mailtooth.com
Pro
32,600 credits · 65,200 Quick checks · 32,600 Standard checks · 16,300 Deepchecks
Read 11 Oct 2026 · mailtooth.com
Scale
55,000 credits · 110,000 Quick checks · 55,000 Standard checks · 27,500 Deepchecks
Read 11 Oct 2026 · mailtooth.com
On the record
- API
- The service offers single-address and bulk verification APIs for programmatic verification.mailtooth.com · read 11 Oct 2026
- Bulk workflow
- Users can upload CSV or TXT files in the dashboard, select an email column and verification depth, and download completed results.mailtooth.com · read 11 Oct 2026
- Checks
- Depending on depth, checks include syntax, MX and domain signals, disposable and role-based addresses, SPF/DKIM/DMARC, blocklists, WHOIS, SMTP mailbox verification, and catch-all behavior.mailtooth.com · read 11 Oct 2026
- Chrome extension
- The Chrome side-panel extension discovers and verifies addresses while browsing and can save results to lists or export them as CSV.mailtooth.com · read 11 Oct 2026
- Form protection
- A one-line JavaScript integration checks email fields before form submission and supports configurable blocking rules.mailtooth.com · read 11 Oct 2026
- Integrations
- MailTooth supports campaigns through connected Resend accounts and exposes a verify_email tool through a remote MCP server for compatible AI clients.mailtooth.com · read 11 Oct 2026
- Limits
- The MCP verification tool handles one email per call; MailTooth directs large datasets to bulk verification.mailtooth.com · read 11 Oct 2026
- Privacy and retention
- MailTooth processes verification inputs, results, bulk files, and usage records, and retains information as reasonably necessary for service, legal, dispute-resolution, and abuse-prevention purposes.mailtooth.com · read 11 Oct 2026
- Product
- MailTooth verifies individual email addresses and lists and shows evidence for safe, risky, or invalid results.mailtooth.com · read 11 Oct 2026
- Security
- The privacy policy says MailTooth uses administrative and technical safeguards, while noting that no online service can guarantee absolute security.mailtooth.com · read 11 Oct 2026
- Support
- The site lists [email protected] as its contact address.mailtooth.com · read 11 Oct 2026
- Team features
- Workspaces support owner, admin, member, and viewer roles, with credits, API keys, lists, and activity organized per workspace.mailtooth.com · read 11 Oct 2026
- Verification depths
- Quick costs 0.5 credit, Standard costs 1 credit, and Deepcheck costs 2 credits.mailtooth.com · read 11 Oct 2026
