Email Verifier
Email Verifier is a app in the osFoundry community catalog. Self-hosted email-deliverability checker — verifies syntax, MX records, SMTP reachability, catch-all detection, and disposable / role-based heuristics. Open-source alternative to Hunter.io, NeverBounce, and ZeroBounce. Powered by Reacher (check-if-email-exists). Ships a single Rust HTTP service.
**Heads-up:** Full SMTP verification requires outbound port 25, which is blocked on most hosted networks (including this one) to prevent spam. When that's blocked, syntax / MX / heuristic checks still work, but the live SMTP probe returns 'unknown'. Run elsewhere if you need conclusive SMTP results.
Details
- Workspace: osfoundry
- Category: COMMUNICATION
- Pricing: Free
- Access: Community
Features
- Self-hosted email-deliverability checker — verifies syntax
- MX records
- SMTP reachability
- Catch-all detection
- Disposable / role-based heuristics
Documentation
# Email Verifier (Reacher)
Self-hosted email-deliverability checker, powered by Reacher.
## Features
- Syntax + MX + SMTP probe + catch-all + disposable / role-based detection
- Single REST endpoint: `POST /v0/check_email` `{ "to_email": "..." }`
- Bulk verification queue (paid Reacher plans)
## Caveat — port 25
Reacher's live SMTP probe opens outbound port 25 to the recipient's mail server. Hosted networks usually block port 25 to prevent spam, so the probe returns `is_reachable: "unknown"`. Syntax / MX / heuristic checks still work in that case.
- ✅ Network allows outbound port 25: full live verification.
- ❌ Port 25 blocked (most hosted networks, including this one): inconclusive for SMTP; MX + syntax + heuristic checks still work.
## Packaging
Single Rust binary listening on port 8080 — no database, no persistent state. The `/data` volume holds only logs.
How to use Email Verifier in osFoundry
Install Email Verifier into your workspace in one click, then fork it in osStudio to customise the prompts, tools, or configuration for your stack. Anyone in your workspace can pick up where you left off.
Other apps from the community
- CRM — Customer relationship management with contacts, deals, and pipeline tracking.
- Kanban Board — Drag-and-drop task board with swimlanes, labels, and team assignments.
- Helpdesk — Ticket triage and customer support inbox with SLA tracking.
- Page Builder — Block-based page editor with publishing to public URLs.
- Website Builder — Multi-page site builder with CMS, templates, and custom domains.
- Storefront — E-commerce storefront with product catalog, cart, and checkout.