Problems with Mail post El Capitan
I have just downloaded El Capitan and my mail has gone haywire. It sends mail from my work email address and people do not know it is me that has sent it so delete it as spam. I have tried all the old workarounds for Yosemite but none have solved the problem. No matter what I do the settings are all greyed out. Can anyone help?
I am using a late 2013 iMac 27 inch which is full up to date - sadly!!!!
L
iMac, iOS 7.0.4