Catchall falsely "catches" redirected emails

[gwider]

Dear Colleagues!

on one of my domains I've got the several email redirects and one catchall (Mail > Preferences > Mail to nonexistent user) which gets polled by an exchange server.

Now, all mail to an existing redirect will still be forwarded to the catchall address as well.
Surely, a redirect should be treated as an existent user?

I don't want to create a mailbox for the redirect as it would accumulate quite a lot of mail.
Has anybody come across any fixes, or, Parallels, could this please be fixed?

Thanks you!