In the Magento backend I can set the email addresses used to contact customers in the following place: System -> Configuration -> GENERAL -> Store Email Addresses. How these configured email addresses are used can be further configured under ystem -> Configuration -> SALES -> Sales Emails, for instance, although the defaults are generally fine.
What I don't understand is, under System -> Configuration -> CUSTOMERS -> Customer Configuration -> Create New Account Options, there is an entry under Create New Account Options entitled:
"Default Email Domain"
What is this? After all, the store has its own emails as pointed out above, and each registering customer will have their own email, so whose default is this? After all, as far as I understand it, no store is going to offer customers email adresses under an "email domain", so what the heck is this entry all about? I'm puzzled.
Thanks a lot.