so the problem is on their side, how would it be possible to withdraw bitcoins from your bittrex account without sending email with link to the withdrawal authorization?
In general situation, it is possible that the site sent an Email, but the hacker was able to access the Email account and deleted all the traces.
However, in OP's situation, it's quite weird because his email account was tied in his mobile phone which makes it harder to hack. Just want to clarify about this:
5. My gmail need mobile verification to login, an on those time I did not have to confirm any new location Gmail login
@OP, does this mean that if you're in the same location or something, you don't need a verification?
answering this question: "
@OP, does this mean that if you're in the same location or something, you don't need a verification? "
if use the same IP and same device they do not send the code by sms, but if the person uses a different IP and a different device, then they send sms with the code.
So, I ask again how could the supposed hacker access the OP email?
I only see one possibility, someone used the OP device