Also Conrad, I wanted to mention that using Gmail for sending the internet-ID during host install seems problematic. I don't know if they are tightening up security but sending via gmail seems unreliable, even when 'Less secure app access' is enabled, more often than not the email sending is blocked. This always happens when hosts are installed at customer sites (i.e., different IP's) it get blocked but if installing from a know IP (like our office - that has been used before and 'authorized' it) - it works OK.
FYI we have started using mailJet (
https://www.mailjet.com) and it works from the installer. It is free for low volume use (200 emails\month) and takes very little config with SPF\DKIM available to ensure less 'spammy' delivery.
Thanks for your help!
Mike