If you signed up on POSTYPE with Twitter or email address, you have to activate your account. You can skip this if you used Google, Facebook, or Naver account to sign up. Navigation menu will be shown if you click your profile icon on the top right. Now, click [설정] > [이메일 인증]. Confirm your email address or enter correct one, click [인증 메일 보내기]. Soon, you'll get mail from POSTYPE. Click the link in the middle to activate your account fully.