I'm a member of several google and yahoo groups. Of these, one particular yahoo group related emails are downloaded incorrectly in such a way that whatever the original sender is, when downloaded into Thunderbird client, the email seems to be sent by a particular group member. I check the same emails on the corresponding email account accessing via browser; I see the from field is correct. But when I download it into the Thunderbird, it somehow changes to be coming from one particular account. I changed my settings in the corresponding yahoo group in such a way that I change my subscribed email address from @hotmail.com to @gmail.com nothing changed. PS : I'm subscribed to many google and yahoo groups and the same problem DOES NOT occur for my other memberships (all using the same Thunderbird client). Regards