How is it possible that so many accounts got hacked on poloneix and people are receiving these authorization emails from different locations and IPs? Is it that poloneix itself was attacked or the users accessed a link or due to some malware their account got hacked? It happened with me where my blockchain got hacked and I did not get any authorization email as well.
Dude put 2 factor on all your bitcoin accounts.It's so easy.
It is easy to set 2FA but at the same time, people are scared to share their mobile number with random websites.
Bitcoin/Altcoin exchanges are not the pinnacle of trustworthiness considered even the biggest exchanges were hacked in the past.
Op, when your mail was hacked along with your Poloniex account, then security of your device has been breached, reset every password and make sure nothing has been stolen.
Many websites use google authenticator where it isn't necessary to give your phone number. You just need the code and own that device. Device lost means your 2FA is useless then.