If you are able to receive e-mail, but are having difficulty in sending e-mail using Outlook, Outlook Express, Apple Mail, Thunderbird, etc., then there are a few possibilities:

 1. Make sure that you have your SMTP server setup correctly. The server will be your domain name. You'll also want to confirm that you have it setup to authenticate with your mailbox username and password.

2. Most, likely problem is that your ISP (Internet Service Provider) blocks external SMTP servers from being used when you are on their network. Contact your ISP and ask them what SMTP server you should be using.

3. If all else fails, please contact support and we'll assist you.