How to configure Thunderbird to connect to an email account
Mozilla Thunderbird is a cross-platform, open source email client. You can download it from Mozilla's official site.
In order to use it first you need to create an email account. You can do this from the Email section of the Pixie control panel. If you need help for this read the tutorial on creating an email account.
After you start Thunderbird go to the Tools menu and select Account Settings. Then click on the Account Actions button in the lower left corner of the Account Settings window and select Add Mail Account. On the window that pops up you have to type your name, the full email address and the password. Then click on Continue. On the next window select whether you want to use IMAP or POP for incoming mail server type and click on the Manual config button.
On the next window you have to type the name of the incoming and outgoing mail server. You can use your domain name (e.g. yourdomain.com), if it points to our servers, or you can also use the name or IP address of the HostKnox server hosting your account.
If you want to enable SSL/TLS you have to use the server name or IP address. If you want to use encryption you also have to set both SSL drop-down menus to SSL/TLS. The port numbers should adjust themselves automatically. The correct ones are 587 for outgoing server without SSL/TLS, and 465 if you enable SSL/TLS. The IMAP port numbers are 143 without SSL/TLS and 993 with SSL/TLS. For POP without SSL the correct port number is 110 and with SSL enabled it's 995.
In the field for Username type your full email address (e.g. firstname.lastname@example.org). After you set everything click on the button Re-test, and then on Create Account. Your email account will be added in Thunderbird and you can use it to manage your mailbox.
For some more details and screenshots read the tutorial on configuring Mozilla Thunderbird to connect to your email account.