<VV> NO Corvair - computer problem help needed

[grant young]

Hi, just looking for some advise from one of our more computer literate members :-). I am starting to get some email messages that come in one very long line of text. I have checked all the settings I know to check, and it is only a few messages, mostly from major websites like Yahoo, my credit card processor, etc. Any help in a private reply would be appreciated.
Thanks,
Grant