how i can get full header of pop3 email?

Answer 1

Assuming you are in Yahoo mail:

To configure this option for a single message:


Open the message you would like to view the headers for.
Click on the "Full Headers" link located on the bottom right-hand side of the message window
Your message will then appear with full headers.
Please note: This option will only apply towards the message you have selected to view full headers for. Your selection will not be saved for all messages.

To configure this option for all messages:


Click on the "Mail Options" link located near the top right-hand side of the page.
Click the "General Preferences" link.
Locate the Show Headers heading and select either "Brief" or "All."
Click the "Save" button to put your new settings into effect.

If you are using a different client to read your email, please consult with your mail administrator or mail program's help system for more information on viewing full headers. Depending on the set-up of your mail account or server, this header information may not be visible or otherwise available to you.

Answer 2

In your mail client of choice search for the option to view all headers. Voila.