A little history I'm running win. 7 had Norton then uninstalled (expired) installed microsoft security essentials was advised to go with McFee....

Installed McFee that removed Windows Defender and I unistalled M.S.E. everything seemed fine. Was receiving mail surfing net good...

Till I went to send an email then it failed I can still receive but cant send...Below is the message I get

Any help please

thanks

Bruce