and lots of other headers, appended by spam filters, mailing list managers, email programs and auto replies. Some of these headers are used to tell your email program something about the message (like how to display it); others are mostly to debug problems. But all of them can tell you a lot more about your email than what you usually see.

So, how do you view and/or send the full headers of your email? Click on your email client in the list below for detailed instructions.

Default Sending Instructions:
In most email clients, emailing the full headers of a message requires displaying the full headers of the message, copying them using your system's Copy command (Typically Ctrl-C or Command-C), or using your system's Select All Command (Ctrl-A or Command-A), then Copy. You can then use your system's Paste command (Ctrl-V or Command-V) to insert the headers or complete message into your email message. Instructions for displaying the full headers of messages, and, where appropriate, alternate methods for sending the headers, can be found below.

Outlook 98 and Outlook 2000
Setting Up: On the Tools menu, click "Options". Click the Preferences tab, and then click E-mail Options. In the "When forwarding a message" field, select "Attach original message".

Outlook 2002/XP
Viewing Headers: Right-click on the message. In the Options menu, click "Internet Headers".

Outlook Express 5 or 6
Viewing Headers: Select the message and press Ctrl-F3.
 

Outlook Express 4
Viewing Headers: Right-click on the message, and select "Properties". Choose the Details tab, and select the "Message Source" button.
 

Outlook Express for Mac
Viewing Headers: Select the message. On the View menu, click "Source".
 

Microsoft Exchange
Viewing Headers: Open the message. Click on File->Properties, then the Details Tab. Click "Message Source".
 

Microsoft Entourage
Viewing Headers: Open the message. In the View menu, click "Source".
 

Mac Mail (OSX)
Viewing Headers: Open the message. Select menu View->Show->Raw Source
 

Yahoo!
Setting Up: to view the headers: Click on Mail Preference. Under "Message Headers", select "All".
to email the message: Click on Options. Under Message Actions, set Forwarding to "forward as attachment".
 

Mutt
Setting Up: If Mutt does not already forward messages as message/rfc822 attachments, add the following line to your .muttrc:

set mime_forward

Netscape
Setting Up: From the Edit pulldown menu select the Preferences option. A popup window will appear. Under the "Mail & Newsgroups" category in the select list, click on the "Messages" or "Message Composition" sub-category. (If no sub-categories are visible, click on the arrow next to "Mail & Newsgroups" first.) Select "Forward as Attachment".
 

Viewing Headers: Open the message. On the toolbar just above the message, click the button that reads "blah blah blah".
 

Eudora Pro
Viewing Headers: Open the message. On the toolbar just above the message, click the button that reads "blah blah blah".
 

Pegasus E-mail
Viewing Headers: Select the message, and press Ctrl-H.
 

AOL
Viewing Headers: Open the message. Select File->Save As... Give the message a name (like spamemail.html), and press "Save".
 

Netscape WebMail
Viewing Headers: While viewing the message, click on the yellow triangle to the right of the compressed message headers.
 

The Bat!
Viewing Headers: To view the full headers of an email, open the email, and either:

• Click on View -> RFC-822 headers; or
• press Control-Shift-K

pine
Viewing Headers: To view the full headers of an email, open the email, and hit "h" for headers.
 

Hotmail
Viewing Headers: Click on Options->Mail Display Settings. Under Message Headers, click on "Advanced".
 

nmh 1.0.4 for Solaris
Rather than forwarding the message, it is necssary to compose a new message. In the new message enter the following text.

#forw <N>

Where <N> is the number of the message in the current folder which is to be attached. The command "#forw +<folder> <N>" forwards message <N> from folder +<folder>.

After entering that data in the message body, nmh prompts "What Now?", enter "mime" then "send" and you will have generated an RFC822 message.