All my emails sent out to different email addresses bounce back with the from and to email address the same as mine. Even if I receive an email from someone when I reply their reply email address is shown. BUT as soon as I click the send button I get a DELIVERY FAILED: INVALID ADDRESSES message with the from: and to: the same.
Emails coming in are no problem. Just new emails being sent out or replies to inward emails.

I have just installed the program.
Also calender doesn't save appointments. There is absolutely nothing there. So I can't record appointments