GMail may understand this (it is a standard, I believe) but many sites reject a "+" in an email address. My ISP is panix.com, which allows me an unlimited numb

GMail may understand this (it is a standard, I believe) but many sites reject a "+" in an email address. My ISP is panix.com, which allows me an unlimited number of addresses like "STORENAME@myemail.users.panix.com". This is almost always accepted by websites, works just like the "+" version, and only once has anyone ever been surprised by it. ("Is this a joke???" "No, etc.") Disclaimer: Just a happy customer.