I was able to log in and withdraw my coins smoothly last Sept 25. However, there's a difference because I was using Google Auth, not an Email Auth.
I visited their twitter account and saw at least 2 users who are in the same situation as you. I can say that both of them are using Email Auth too, based on their
tweets. Even if it's most likely a problem on Liqui's side, you should still contact your email service provider to confirm and if really not blocked, get back to Liqui for them to fix it. Well, I hope they will if ever.
You should move this thread to "Economy --- Exchanges". Use the
move topic link on the bottom left of the page