It accepts Hebrew character input and pasting from the Unicode/XML Tanach.
???
for example.
Your "for example" results in ??? for me. That is, three question marks.
But then again I dont have this thunderbird thing (being one of those who,
finding no fault with what I use, have no real impetus to change)- That
being said, if everyone on b-hebrew gets the mailer then maybe it would be
useful.