
1. In Mozilla Thunderbird, select Tools > Account Settings.
Please note: mail.mydomain.com where "mydomain.com" is your actual domain name.
2. Select "Email account" and click Next.
3. Enter your name and e-mail address.
4. Select "POP" as the type of incoming server you are using. Your incoming server is mail.mydomain.com, where "mydomain.com" is the name of your domain. Click Next.
5. Enter your e-mail address for the "Incoming User Name," and "Outgoing User Name." Click Next.
6. Enter a name for your e-mail account and click Next.
7. Verify your account information and click Finish.
8. In the Account Settings window, select "Outgoing Server" listed below your new account.
9. Enter mail.mydomain.com as you outgoing mail server.
10. Select "Use name and password" and enter your e-mail address. Thunderbird will ask you for your password the first time you try to send mail. Click OK.