I need to see all mails received or sent by an address on the server on any given date 30  days back.

On a list and not in the logs like window.

Simple oversight.

Than I can click on an email and get detailed information about that specific email.

What does it take to implement this regarding time/cost?

If there are anybody else out there wanting the same feature, we could get together for a sponsorship for the development to do this...