Check the mail exchange records for a domain.
Email tools
Inspect headers, preview HTML mail and validate delivery records.
Inspect headers, preview HTML mail and validate delivery records. 13 tools are live in this category, 8 of which run entirely in your browser — nothing is uploaded for those and 5 that use the processing service, marked as such before you start. MX Lookup, SPF Inspector and DMARC Inspector are among the ones people reach for most. None of them need an account or a sign-up to use.
Parse an SPF record and count DNS lookups.
Read a DMARC policy and explain what it enforces.
Trace delivery hops and read authentication results.
Open an .eml message safely without a mail client.
Render an HTML email and check it at several widths.
See how a subject line truncates in common clients.
Build a mailto: link with subject, cc and body.
Check whether an address is well-formed.
Inspect the MIME parts and encodings of a message.
Look up and parse a DKIM public key record.
Check whether an IP or domain appears on common lists.
Estimate how big a message will be with attachments.