Jean Parrot -> August Abolins said..

 JP> Now, I am looking where to disable the "keep an email" in the
 JP>  address book of TB, it seems that every message, spam
 JP> included, will write the sender's address in my AB, a pain !
 JP> Any solution ? I have just looked at all that I could look at
 JP> and did not find anything.


Tools, Options, Composition, then select the "Addressing" tab,
then remove the checkmark in "Automatically add email address.."

--- Thunderbird 2.0.0.24 (Windows/20100228)