Unable to send messages while traveling

Use Vista. Can receive messages while traveling. Though this error message
occurs when attempting to send emails. Any suggestions? Thanks for your help.

Error Message: The connection to the server has failed. Subject 'Fw:
Southeast District Update', Account: 'mail.wraser.com', Server:
'mail.bellsouth.net', Protocol: SMTP, Port: 25, Secure(SSL): No, Socket
Error: 10060, Error Number: 0x800CCC0E