---
title: "SMTP Server Test: Test a mail server from our server…"
canonical: "https://openvibe.tools/tool/smtp"
updated: null
---

# SMTP Server Test: Test a mail server from our server…

HTML: [SMTP Server Test: Test a mail server from our server…](https://openvibe.tools/tool/smtp)

# SMTP Server Test

Connects to a mail server — or to the main MX host of a domain — reads its greeting, sends EHLO and, when STARTTLS is offered, upgrades the connection to report the TLS version and certificate. It never sends a message.

- **Limits** No file upload · Up to 400 runs a day
- **Where it runs** Runs on our server; no file is uploaded.
- **Cost** Free, with the limits above. No account needed.

 [Open SMTP Server Test](https://smtp.openvibe.tools/) 

## Where to find it

Every address below opens the same tool. The first address is the one to bookmark and share.

- [smtp.openvibe.tools](https://smtp.openvibe.tools/)Primary

## People also call this

**What it's for:** Test a mail server from our server: connection, greeting banner, EHLO extensions, STARTTLS with its TLS version and certificate, and the login methods offered. Ports 25 and 587.

- smtp test
- smtp server check
- mail server test
- starttls check
- smtp connectivity

## Use it from code

- `POST https://openvibe.tools/api/v1/tools/smtp/run`
- Needs a signed-in browser session or a token with `tools.tool.run`.
- It answers with the result.

~~~~
curl -X POST https://openvibe.tools/api/v1/tools/smtp/run \
  -H 'Authorization: Bearer $OPENVIBE_TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{"input":{"target":"example.com"}}'
~~~~

Inputs: [JSON Schema](/api/v1/tools/smtp/schema) · [OpenAPI](/api/v1/openapi.json) · from JavaScript: `tools.run("smtp", …)` in [openvibe-sdk](https://github.com/OpenVibers/OpenVibe.SDK) · [How the API works](/developers)

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5 links

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