Currently logical expressions can only be constructed with quicksearch expressions like:

  al 30 & C my@mail.address

But trying to do something interesting by using a filtering expression with a quicksearch one, for example:

  header "List-Id" matchcase "some.list.id" | C "some@list.address"

Renders the whole expression invalid.

Would be interesting to make the "all filtering expressions are allowed" stated in the quicksearch extended search info dialog to become true.

thanks in advance and best regards,