I've googled EUDORA "BUFFER OVERFLOW" and got several hits that might be relevant. I'll have to leave the troubleshooting to you, I'm afraid.
http://eudorabb.qualcomm.com/showthread.php?t=8685 is the first one.
I have a Dell PC., running windows xp.
I use Eudora as my mail program. It is telling me that I have a buffer overflow which, it seems, makes me somewhat vunerable. What is it and what should I do about it.