1.) The first thing I noticed was "delivery by mail" in the top text, and it made me concerned; any communication of potential vulnerabilities (i.e. scan results) should be properly encrypted to the recipient and authenticated from you.

2.) The site layout (css) is buggy. On older browsers, some text is positioned partially off screen on the left. Yes, supporting old browsers is a pain, but within reason, it's worthwhile.

3.) The top menu has a white text, but since the top menu stays in place when scrolling on to a white background below, the menu text becomes unreadable (white on white).

Good Luck!