mailing list setup

hi,

mailinglist setup

when i tested it, i received a email. then when i click to confirm in the email the following error shows up

”
Not Found

The requested URL /confirm/mailinglist/db99d4b5bff03ca1db9b6d1b19747f0a was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
”
what should i do?

and how does the unsubscribe from mailinglist setup work?

any help? thnx
mirko