Python : Obsolete or unsafe function

The function used is deprecated or unsafe (regardless of how it is used). It is recommended to replace it with a secure analog.

The smtplib library in CPython (aka Python) before 2.7.12, 3.x to 3.4.5, and 3.5.x to 3.5.2 does not return an error if the SMTP.starttls(), which can allow “man-in-the-middle” attacks to bypass the protection of TLS. I.e., using the network location between the client and the registry, block the StartTLS command.