Have pressed the 'update upcoming issue and email test copy' button a couple of times now (maybe 10 minutes apart) and neither has resulted in the edit being emailed to me. Last couple of months the edit was arriving almostb instantly. Just flagging in case it points to something more serious in the mail servers your end?
Super strange ... I just tested a copy and forwarded it to you. Seemed to work fine from my desktop, but on my iPhone, it landed in 'Clutter' (Use MS Exchange) and the body message was blank. I think it's because you have some weird characters in the email where you wish a happy holidays in multiple languages.