If you haven’t ready set up Google PostmasterTools we’d likely recommend it. Not only does it give you insight into your email performance at Gmail it will also help our team diagnose your deliverability problems. That said, here’s how to share access with our email deliverability consultants.
1) Login to http://postmaster.google.com and hover over the domain to share. A context menu pops up. Click on the “Manage Users” link:
2) Clicking on the big red “+” button in the bottom right and input “email@example.com” in the popover and click NEXT:
3) That’s it!