---
title: "SMTP Server Tester - Free tester | FirstSales"
description: "The SMTP Server Tester connects to your mail server via SMTP, tests the handshake, verifies TLS support, and optionally tests authentication. Diagnose"
canonical: "https://firstsales.io/tools/smtp-server-tester/"
---

100% Free • No SignupEmail Deliverability & Authenticationtester

# SMTP Server Tester

Test SMTP connectivity by sending a test message and verifying handshake, TLS, and authentication. Works instantly without signup.

Instant Results

No Signup

[Home](/)/[Tools](/tools/)/SMTP Server Tester

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SMTP Server Tester

Test SMTP Server

Check SMTP server availability, ports, and configuration

[Stop doing this by hand. FirstSales runs your email deliverability & authentication on autopilot, 24/7.Start your $1 trial](https://app.firstsales.io)

## Key Features

Connection testing

Handshake analysis

TLS verification

Authentication test

Detailed diagnostics

## Use Cases

1

Server troubleshooting

2

Connectivity verification

3

TLS testing

4

Configuration validation

Tool Info

Typetester

Free

Yes

Signup

Not Required

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Start your $1 trial

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## About SMTP Server Tester

The SMTP Server Tester connects to your mail server via SMTP, tests the handshake, verifies TLS support, and optionally tests authentication. Diagnose mail server connectivity issues.

## Automate Your Email Deliverability & Authentication

This free tool is great for quick checks. FirstSales automates your entire email deliverability & authentication workflow with AI-powered personalization and 87% inbox placement.

[Start your $1 trial](https://app.firstsales.io)

Setup in 8 minutes • Cancel anytime

## FAQs

Your questions answered

Can't find what you're looking for? Contact our [customer support team](mailto:support@firstsales.io)

### General

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### Deliverability

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Can't find what you're looking for? Contact our [customer support team](mailto:support@firstsales.io)