1. A method performed by one or more processors configured with computer-executable instructions, the method comprising: receiving an account associated with information including an email address; extracting one or more features from the information associated with the account, wherein at least one of the one or more features is based on memorability of the email address, the memorability relating to a pattern of symmetry, anti-symmetry, or uniformly distanced characters in the email address; and determining a trust level of the account at least partly based on the extracted features.