This is the welcome email to the user you add onto Shotgun. When you add a user via Web app, a welcome email will be sent to the user’s email used to create the account and he/she could click Accept Invitation to set his/her password.
Yes, this is what I see (but there’s nothing before “invited you” (in your case Ben Xu). I am not using the Web app.
Using the python API, I simply modify the user (not creating the user, and yes this HumanUser was created via the API initially). Updating custom fields (not email, login or other builtin fields).
I didn’t have this email before (let’s say 2-3 months ago).
Any ideas?