Can't get e-mail to send. Can anyone assist? All I get is the following message (3 examples):

 

The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was'. Subject '', Account: 'pop.telus.net', Server: 'smtp.telus.net', Protocol: SMTP, Server Response: '550 relaying mail to hotmail.com is not allowed', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79

 

The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was'. Subject 'Re: ', Account: 'pop.telus.net', Server: 'smtp.telus.net', Protocol: SMTP, Server Response: '550 relaying mail to hotmail.com is not allowed', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79

 

The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was ''. Subject 'Fw: GameHouse Purchase Receipt: 16113739', Account: 'pop.telus.net', Server: 'smtp.telus.net', Protocol: SMTP, Server Response: '550 relaying mail to hotmail.com is not allowed', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79