I invited somebody to my Yahoo! Group, and when they get the invitation email (to their Gmail account) there's a 'Join' button... when that is clicked it takes you to the Yahoo! Groups homepage with another 'Join' button... but clicking that button takes you to the Yahoo! login page which requires a Yahoo! account. They tried entering the Gmail address but it says 'not recognized' I thought at some point you didn't need a Yahoo! address to receive emails from Yahoo! Groups ?
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