Greetings,
Thanks for your reply, I've tried using 'install' as a password but it keeps saying it is incorrect
"install" is indeed the default password - it should be used if the ListMail password is not set.
When you try to login is there a 7 second delay and a message that says "this attempt has been logged"? Or, do you simply get 'bounced' back to the login screen?
The latter might be a cookie problem or a server anomaly, which can be caused by a very old version of PHP (guessing a bit, 4.3+ should be fine) or other configuration issue.
Try clearing the cookies for your ListMail domain in your browser settings, and try another browser, ie. FireFox instead of Internet Explorer
If you continue to have troubles please
submit a bug report and I will investigate.
Regards