Filter genuine email

## Security Feature
In your application anyone can enter using **temporary or disposable email**.
I will add a feature so that no one could create an account using **temporary or disposable email**.
It will allow only genuine users in your database.
It will help to avoid any bot.
Assign me this work under GSSoC24, I will implement it.

No file, test, or entry point is named in the issue. Start by locating the account-creation flow and determine how temporary addresses would be identified; done means disposable addresses are rejected while genuine users can still register, with coverage for both cases.

Written by the indexing model from the issue text.