Everytime I come here, and log in, as soon as I put my email address the website popups up a suggetsion that I use a different email address instead. It has the same username part, and the same TLD, but the second level domain is replaced with "gmx". There is no gmx registered in the TLD that I'm using. An inspection of the html shows that the guildwars2 website is putting the suggestion in a div class login-email-suggestion. It has always been the same address, my username part, @, gmx, my TLD.