A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to add the Carriage Return and Line Feed (CRLF) control characters and include arbitrary SMTP headers in the generated test email.

A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.

User controlled parameters related to SMTP notifications are not correctly validated. This can lead to a buffer overflow resulting in crashes and data leakage.