Viewing message headers may help you figure out what
vocabulary or strings you may wish to add to "banned
vocabulary" as part of your spam-fighting filters. Seeing
what header SpamAssassin added can often give you useful
At other times, viewing message headers may enable you to
determine whether an email is legitimate mail or is likely
to have a forged "From" line.
Here are some directions as to how to view full headers
for some of the more popular email and usenet clients.
Open the message.
Click the "blah blah" icon that appears above the inbox
to see the raw message header.
To view full headers, from the Menu bar, click on
"Messages," and then click "Show All Header
Open the message.
In the View menu, click Options.
The headers appear in the Internet headers box.
For Outlook Express:
Right-click on the message, select "properties", select
the "details tab", then click "message source".
To see full headers, you must first set your "options" to
allow you to view full message headers:
Click "Options" and when the screen loads, scroll down
down to "Preferences" and click "Preferences"
Find "Message Headers" under "Other Hotmail Options" and
Click "OK" and return to your inbox.
From Yahoo, it's basically the same as with Hotmail.
Login to your account, go to "Options", select "Mail
Preferences", go down and select "All" under the "Message
To view your raw message headers when you are logged into
the webmail, you must have the message open in your inbox.
Then simply click the "View Full Headers" link above the
In Netscape Messenger, click "View" then "Headers" and
select "All". That's all there is to it. This will show the
raw message header.
If your email client/provider isn't listed and/or you
cannot find how to view your full message headers, please
contact helpdesk at cotse.net for assistance.