Starting in late February, I began receiving spam where the user-agent
line of the header was this:
User-Agent: Thunderbird 2.0.0.9 (Windows/20071031)
A search of my entire e-mail inventory going back almost 10 years
indicates that the only e-mails I've received with "Thunderbird
2.0.0.9" in the User-Agent line corresponds only to this new set of
spam, and not to any "legit" e-mails.
My question is this:
Does "Thunderbird 2.0.0.9" correspond to a string fragment that I
would or could encounter in the header of an e-mail sent by a human
using some version of Thunderbird?
Does any version of Thunderbird have:
"Thunderbird 2.0.0.9 (Windows/20071031)"
As the exact (and only) contents of the User-Agent line?
If the answer is no, then I will add:
[User-Agent contains "Thunderbird 2.0.0.9"]
or
[User-Agent is Thunderbird 2.0.0.9 (Windows/20071031)]
to the list of spam-detection conditions for my e-mail client
(Communicator 4.79).
