SMTP Port 25 Blocked?
Some Internet Service Providers or network administrators block the default port (25) reserved for standard SMTP communication. Our users with SMTP can workaround this problem by switching to secure SMTP, or an alternate port for email programs that do not support secure SMTP. To protect all our users, and to provide high quality service, Accounts are suspended if they violate the of terms of use. Do not use your email to send out spam!