"Tessie" likely refers to the specific user, bot, or project associated with this data string.

Since the subject line itself is heavily encoded, here is a detailed breakdown of what these components typically represent: 1. The "Mojibake" (Garbled Text)

If you have the or the intended language of the message, I can try to decode the text to see if there is a hidden message behind the symbols.

In many cases, these garbled strings translate to standard headers like "Re:" or "Subject:" when decoded correctly. 2. The Domain: wu.ha.free.fr