The link you provided / clicked on did not have enough detail to start the email management session.

This is typically caused by your email client ignoring the trailing part of the URL.

Correct links

The URL should look similar to

http://xircles.codehaus.org/manage_email/manage/feeddebeefcafebabe

Incorrect links

If the URL looks like either of the following, then you will need to copy it manually into your browser.

http://xircles.codehaus.org/manage_email/manage/aeb56b

http://xircles.codehaus.org/manage_email/manage/

Please copy and paste the *whole* link into your browser and see if that resolves the problem.