# Email Deliverability Tester

> Free email deliverability tester. Send a real test email and check SPF, DKIM, DMARC, alignment, sending IP, blocklists, unsubscribe headers, links, content, and fix steps.

- Human page: https://mailrith.com/free-tools/email-deliverability-tester
- Markdown page: https://mailrith.com/free-tools/email-deliverability-tester.md
- Category: Reputation
- Action label: Start Deliverability Test
- Primary keyword: email deliverability tester
- Related keywords: email deliverability tester, email deliverability test, test email deliverability, email inbox placement test, email spam test address
- Browser execution: No. This tool uses a temporary Mailrith test address and server-side received-message analysis.
- Signup required: No

## Input
- Label: Test Email
- Guidance: Start a test to get a temporary address, then send the real email from the same sending system you plan to use for the campaign.
- Placeholder example: A temporary test address will be generated

## How to Use
1. Open the human page: https://mailrith.com/free-tools/email-deliverability-tester
2. Select Start Deliverability Test to create a temporary test address.
3. Copy the address and send the real test email to it from the same sending system planned for the live send.
4. Keep the page open while Mailrith waits for and analyzes the received email.
5. Review the status, checked facts, and next actions.
6. Use the linked guide section for any issue that needs a fix.

## Topic Overview
A deliverability test is different from a record lookup. Instead of checking only DNS or only the email copy, this tool gives you a temporary Mailrith address and waits for the real message you send to it. That lets the report inspect the received email headers, authentication result, visible From domain, return-path, DKIM signing domain, likely sending IP, unsubscribe signals, links, body size, and content clues. If you are setting up a sender domain, start with [Sender Domains and Email Authentication](https://mailrith.com/guides/sender-domains-and-authentication.md#steps).

Use this tester before a campaign, launch email, product update, newsletter, or sequence email that will go to many people. Send the test from the same email delivery service, sender domain, template, and tracking setup you plan to use live. The result cannot promise inbox placement at Gmail, Outlook, Yahoo, or company mailboxes, but it can show whether the message has fixable problems before you risk a broad send. If the report mentions alignment, read [DMARC Alignment](https://mailrith.com/guides/dmarc-alignment.md#check-dkim-alignment-in-real-email); if it mentions unsubscribe headers, read [One-Click Unsubscribe and Opt-Outs](https://mailrith.com/guides/one-click-unsubscribe.md#one-click-unsubscribe-header).

## What the Tool Checks
- Real received-message headers
- SPF, DKIM, DMARC, and alignment results
- Visible From, return-path, and signing domains
- Likely sending IP, PTR, and public blocklist signals
- One-click unsubscribe and visible unsubscribe signals
- Subject, links, body size, and content risk notes

## Result Behavior
The result analyzes the actual message Mailrith received and puts the highest-impact fixes first.

## AI Agent Notes
- Use this markdown page for retrieval, summarization, and deciding which tool to recommend.
- Use the human page when the user needs to run the checker interactively.
- This tool does not send email for the user. It creates a temporary address, then analyzes the real message the user sends to that address.
- When the result mentions a server-side confirmation, explain that the browser page can show public signals but cannot complete that network check by itself.

## Related Guides
- [Sender Domains and Email Authentication](https://mailrith.com/guides/sender-domains-and-authentication.md#steps): Set up the domain signals that inboxes expect before broad sending.
- [DMARC Alignment](https://mailrith.com/guides/dmarc-alignment.md#check-dkim-alignment-in-real-email): Understand why SPF or DKIM must line up with the visible From domain.
- [One-Click Unsubscribe and Opt-Outs](https://mailrith.com/guides/one-click-unsubscribe.md#one-click-unsubscribe-header): Add unsubscribe signals expected by Gmail, Yahoo, and subscribers.

## FAQs
### Can this guarantee inbox placement?

No. The test checks one real message received by Mailrith. It can find setup, header, content, and public reputation risks, but each inbox provider still uses its own private filtering and subscriber-engagement signals.
### Is this the same as the SPF, DKIM, DMARC, or spam checker?

No. Those tools inspect one specific area. This tester checks the actual email that was sent to Mailrith, then combines authentication, alignment, sending IP, unsubscribe, link, size, and content signals into one report.
### Does Mailrith store the test email?

The Phase 1 tester stores a short-lived test result so the page can show the report after your email arrives. The temporary address expires, and the result is not added to any subscriber list.