I press Ctrl+U in the Icedove (Thunderbird), and see plaintext. Last two headers are:

Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: base64

and the rest data is encoded.

How to conveniently view HTML source of such email in Icedove without manually copying and decoding the base64?


If you search on the Thunderbird Addon page for "base64", you'll find an addon called "Mnenhy" which offers base64-decoding on right-click.

Open The Thunderbird Menu and click on "Add-ons" Search for "mnenhy" and install the addon Restart the browser Right-click on base64-encoded text and click on "Base64" which is as sub-entry of "Decoders"

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