Say for example you are creating a new google email account, you decided that your email will have a dot in between to differentiate your family name from your first name, e.g. firstname.lastname@example.org. We can tell you this there is no need to put dots.
This is because gmail neglects all dots, i.e. if I send an email email@example.com, firstname.lastname@example.org will be able to receive it. Even if I send it to email@example.com, and firstname.lastname@example.org will still be able to receive it.
It is safe to say that the below statement is correct, unless proven wrong.
Not all email services are like that. Most email servers, example Microsoft and Yahoo, uses dots to differentiate their email. Safe to say that email@example.com is not the same email as firstname.lastname@example.org. But for Gmail, they are both the same.
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