But to my greatest surprise my mail was changed from the previous mail I used without me having to authorise anyone changing my mail, I want to know if this was done by admin or it's a kind of auto reset of a mail because checking from my profile this is not the original mail that I used in signing up this account and I am not also blinded not know the mail I used in signing up my account.
It happened because you use unexisiting email address for registering your account, then you won't receive any email notification for security.
You only get the email security notifications if your email address truly exists.
I added email notifications for some security events:
Whenever your password is changed (except by an administrator), you will get an email about it.
Whenever your email is changed (except by an administrator), your old email will get an email about it with a link to lock your account. The link is valid for 14 days.
Let me know if you find any bugs.