Since a new mail account is automatically created when it is e-mailed to for the first time, would it be possible for a company to change the number of e-mails to 20 by simply changing the number provided in the address? Example:
I give this addres to the company: freemmusic.1.username@spamgourmet.com
As you see, I wish to recieve only ONE message back with, for example, a password.
But the company might change this into:
freemmusic.20.username@spamgourmet.com
before using it.
Is the incident describben above possible? If so, is there any way of protecting?