I have looked all over the forums and other support pages, but no solution has worked. I tried starting in safe mode. I tried deleting my accounts and making new ones. I checked the outgoing address to make sure it is correct. (I use yahoo mail, by the way). I tried turning off my virus software. I tried putting in the office disk and using the fix method. Nothing has worked. It is very irritating having to open yahoo mail on my browser just to send email.