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It depends on the indentity provider being used but by default no emails are generated and/or sent. If you are using the default ASPNet Indentity provider then this blog describes how to intercept events which you could use to send the email:
https://www.dcaric.com/blog/how-to-intercept-the-user-provider-in-episerver-10
When creating a new user in Episerver is an email to the newly created user generated and sent ?
If so what information is within the Email ?
Locally I am not seeing any emails so cant be sure
Regards
Minesh