Having the exact same issue. About a week ago i received an authentication email that went into the spam folder and I clicked on " not spam" and since then, i’m not receiving any email from noreply@guildwars2.com. This is even more frustrating since i switched to a dynamic IP about a month ago and i have to restart the modem to get an IP that was authenticated before this happened. Checked the blocked list and the address is not there, added noreply@guildwars2.com to contacts and still nothing. Seems yahoo messed it up real good. Help please! 