---
title: Free Email Tools | SendHQ
description: Free browser-based email tools for address syntax and MX checks, SPF record lookup, DNS authentication, BIMI, HTML email preflight, and SMTP bounce diagnostics.
canonical: https://sendhq.cc/tools
last-updated: 2026-09-24
---
# Inspect email infrastructure without guesswork

Run focused checks against public DNS or analyze content locally in your browser. Every tool distinguishes observed data from errors and unknown outcomes.

DNS tools send only the domain, or the domain part of a checked address, and the record type to Cloudflare and Google public DNS resolvers. Content analyzers stay in this browser.

## What these tools can establish

They can show public DNS answers, parse published policies, flag common free and disposable mailbox domains, inspect HTML markup, and classify server response codes. Resolver names and error states remain visible.

## What they cannot establish

They cannot prove an address exists, promise delivery or inbox placement, validate every email client, or guarantee that a mailbox provider will display a BIMI logo.

## Start with a production-oriented template.

[Browse email templates](https://sendhq.cc/templates.md)