Verify our email branding

[AndrewDryga]

It will show brand logo and blue check mark for emails sent by us and improve delivery rates: https://support.google.com/mail/answer/13130196?hl=en&visit_id=638418099353499880-2738073321&p=bimi_verification&rd=1

[jamilbk]

This actually requires us to trademark our logo first and then register with a cert authority, which will be a process.

[jamilbk]

Blocked on firezone/bizops#80