It's a little hard to explain. Part of our mail server's features (we run our own mail/webserver) is that if the part before the - is legit and the part after the - doesn't exist, it sends the mail to the person before the -. It is useful for keeping track of who is giving your address out to marketers/spammers. I know that 3FC would never do such a thing but it is just a force of habit to register to websites that way now. For instance of my address was
[email protected] and I registered with amazon.com, I would use
[email protected]. Then if I got an email from Joe Spammer address to
[email protected] I would know the only place they could have gotten my address was from Amazon.com. Make sense?