Hi @Tom_Spink
If you want to use a Google Mail account with 2 factor auth, the way to do it would be with an app password. We have a guide on this which may help: Using a 2-step verification Google Account with QuickFile
You can use our default set up, however these mail servers are actually AWS rather than our own. We don’t currently send emails from your domain name, only the quickfile.co.uk domain, which is already authenticated through Amazon. We do however set a reply-to address which is unique to your account, so all replies are routed back to you.
Hope this helps!