Copenhagen

I have used Eudora for years and have been using 7 and 7.1 for probably a year or more. Windows XP on a AMD64 computer with 3 yahoo mail accounts. Earlier this year Eudora would not send from the personality I wrote the message in but if I went back into the message and changed the sending personality it would go. This became worse and worse until several months ago it quit sending at all. I have been trying everything I know even to reinstalling, searching for solutions, etc and nothing helps. In the out folder it looks like it is sending but the blue activity bar on the bottom of the screen doesn't come on to send. Also it always deletes the files on the server even tho it is instructed not to delete them. any ideas? Thanks.