What email server you using... outlook.com or hotmail.com etc
You may have to add a port number on the end (port could be different for other providers).
smtp.live.com:587 <---- i use :587 for hotmail.com or outlook.com email settings.
tick
-Server requires authenticaTION
-Use secure connection (SSL/TLS) if avaliable
-If server is down,attempt to send directly
Good Luck