When I try and send a message from maximizer I get the following error message.

An unknown error has occurred. Subject 'uh', Account: 'Freddie', Server: 'mail.btconnect.com', Protocol: SMTP, Server Response: '554 No date field given', Port: 25, Secure(SSL): No, Server Error: 554, Error Number: 0x800CCC6F

Am I not able to send messages using Outlook Express and if so what program do I need to enable me to do so?

Many Thanks
Francis Smith