An email header contains vital information about the recipient, the origin of the email and other technical details. Depending on which tool you use, email headers are located in the email source code (comprising the email header and HTML code) or in a separate location. Here is an example of a header (originating from Gmail):
Our customer support team may need the email header to answer your questions (for example, if you have a deliverability problem).
How do you find your email headers?
Every email service is different. To find the email header, we suggest you consult the help pages of the most popular ones:
If you use another email service, here is the complete list available at MXToolbox:
- Outlook 2003
- Outlook 2007
- Outlook 2010
- Outlook Express
- Outlook 97
- Outlook 98
- Outlook 2000
- Outlook 2002
- Microsoft Exchange
- Zimbra
- Entourage
- Mac OS X Mail
- Outlook Express for Macintosh
- Gmail (works for Google Apps as well)
- Yahoo!
- AOL
- Hotmail
- Eudora
- Netscape, Mozilla or Thunderbird
- Lotus Notes
- Pine
- XtraMail
- Pegasus Mail
- Claris Emailer
- Mail Warrior
- Juno
- Novell Groupwise