It would be nice to have a menu item in the search box at right top, which make the emClient search for all addresses of the domain, if only one email address is entered.
You can already do this.
So to search for messages from @abc.com type From:abc.com in the search box.
Or, if you want to use the gui:
But that’s a full text search. What I wanted was a search for sender/recipient.
No, that will search only in the From: header, so the sender’s address.
If you want either sender or recipient, it would look like this: