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The same page content and links, with explicit tool capabilities. Tools marked with an API can run directly through HTTP. Other tools require the browser interface or are not connected yet.

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Find the tool you need, then open it to get started.

All email tools

Separate message formatting from delivery diagnostics

Email tools can inspect addresses, message headers, templates and domain configuration. These tasks answer different questions: a syntactically valid address is not the same as a mailbox that exists, and a configured domain is not a guarantee of inbox placement.

How to choose your next step

Use complete headers or the exact domain needed for the task. Avoid treating one message or one lookup as proof of a general delivery pattern.

Common questions about email tools

Does address validation prove a mailbox exists?

Syntax checks can catch formatting mistakes but cannot prove that a person receives mail at an address. Server-side checks can also be inconclusive.

Do authentication records guarantee inbox delivery?

No. Authentication is one signal among several. Sending behavior, recipient engagement and filtering rules also affect what happens to a message.