To setup a mailbox using IMAP within Thunderbird please follow the instructions below, the details to use for your mailbox can be found
here.
[list]
[*]Open Thunderbird and go to
File > New > Existing Mail Account

[*]On the
Mail Account Setup page enter your mailbox details and click
Continue
[list]
[*]Your Name:
[*]Email Address:
[*]Password:
[/list]

[*]Click on
Manual Config:

[*]Update to match the stackmail settings:

[*]If you need to use the
Re-test option then do so, if not then click
Done and you're ready to go!