---
title: "Mail Tester - Free tester | FirstSales"
description: "The Mail Tester generates unique temporary email addresses for testing email deliverability. Send emails to the generated address and see what arrives"
canonical: "https://firstsales.io/tools/mail-tester/"
---

100% Free • No SignupEmail Deliverability & Authenticationtester

# Mail Tester

Test email deliverability by sending to a temporary inbox and analyzing spam score, headers, and rendering. Works instantly without signup.

Instant Results

No Signup

[Home](/)/[Tools](/tools/)/Mail Tester

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No active session

Please generate a test email address to continue.

[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

Temporary email generation

Real-time email receiving

Spam score analysis

Header inspection

SPF/DKIM/DMARC validation

HTML rendering preview

## Use Cases

1

Email deliverability testing

2

Spam filter diagnosis

3

Email authentication verification

4

Content rendering check

5

Header analysis

Tool Info

Typetester

Free

Yes

Signup

Not Required

Related Tools

[SPF Record CheckerValidate your domain's SPF record and identify misconfigurations that block email delivery](/tools/spf-record-checker/)[DKIM Record CheckerVerify your DKIM DNS record is correctly published and properly signing outgoing emails](/tools/dkim-record-checker/)[DMARC Record CheckerAnalyze your DMARC policy to ensure email authentication alignment and reporting is active](/tools/dmarc-record-checker/)[Email Authentication AnalyzerRun a full SPF + DKIM + DMARC audit on any domain and get a pass/fail scorecard](/tools/email-authentication-analyzer/)[Inbox Placement TesterTest whether your emails land in inbox, spam, or promotions tab across Gmail, Outlook, and Yahoo](/tools/inbox-placement-tester/)[SMTP Server TesterTest SMTP connectivity by sending a test message and verifying handshake, TLS, and authentication](/tools/smtp-server-tester/)

Start your $1 trial

Automated cold email sequences

Smart deliverability tools

Built-in analytics

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

## About Mail Tester

The Mail Tester generates unique temporary email addresses for testing email deliverability. Send emails to the generated address and see what arrives-including headers, spam score, authentication results, and content rendering 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)