Problem with sending mail through windows mail?

I have problem with sending mail through windows mail, everytime I try and send something it says: The connection to the server has failed. Subject '', Account: 'icex.imperial.ac.uk', Server: 'icex.imperial.ac.uk', Protocol: SMTP, Port: 25, Secure(SSL): Yes, Socket Error: 10060, Error... show more I have problem with sending mail through windows mail, everytime I try and send something it says:

The connection to the server has failed. Subject '', Account: 'icex.imperial.ac.uk', Server: 'icex.imperial.ac.uk', Protocol: SMTP, Port: 25, Secure(SSL): Yes, Socket Error: 10060, Error Number: 0x800CCC0E

I have checked the settings of my account:

http://www3.imperial.ac.uk/ict/services/useremailfileanddirectoryservices/email/emailapplicationsetup/windowsmail/winmailspop3/

and they are all correct and I can receive mail but I can't send any... can someone help??
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