Free email tools

Check a domain before you send from it, or an address before you send to it. Live DNS checks, honest results, no sign-up and nothing stored.

Domain email health check

SPF, DMARC, MX and blocklists for a domain in one report, with what to fix first.

Parses the SPF record, counts its DNS lookups against the limit of 10 and says how to fix what breaks it.

Reads the DMARC policy, report addresses and alignment, and says what the policy actually does to spoofed mail.

Reads a DKIM key by selector, or searches the common ones, and checks its type and length.

The mail servers of a domain, their addresses and who hosts the mailboxes.

A domain and its mail servers against public DNS blocklists.

Which mailbox provider and which sending services a domain uses.

Format, mail servers, throwaway domains, role addresses and typos for one address.

Up to 100 addresses from a pasted list or a CSV, with a CSV of the results. Nothing stored.

Whether an address or domain belongs to a throwaway-mail service.

Paste email HTML, see it on desktop and phone with images on or off, and what breaks in Gmail and Outlook.

A template with {{tags}} and JSON data in, the email out, with every tag that would reach the recipient unfilled.

How a subject and preheader look in iPhone Mail and Gmail, where phones cut them, and what reads like a pitch.