Email · Website glossary

Email header

Quick answer · What is Email header?

A structured field in a message carrying information such as its sender, recipient, subject, or transport history.

IN PRACTICE

Email header: an example

A support investigation reviews Received fields and authentication results from an exported message.

KEEP IN MIND

Headers can include private addresses and identifiers; share the necessary evidence through an appropriate support channel.

Put the idea to work

Frequently asked questions

What is a practical example of Email header?

A support investigation reviews Received fields and authentication results from an exported message.

What should I consider before sharing message headers?

Headers can include private addresses and identifiers; share the necessary evidence through an appropriate support channel.

Which concepts should I read alongside Email header?

Message-ID: A message header field intended to identify a particular version of an email message.
SMTP: Simple Mail Transfer Protocol is used to submit and transfer email between systems.