Security researchers have found inconsistencies in how some Simple Mail Transfer Protocol (SMTP) servers handle end-of-data sequences. This allows the injection of SMTP commands into email messages in ...

A novel way to abuse a decades-old protocol used to send emails since the beginning of the Internet allows attackers to evade Domain-based Message Authentication, Reporting and Conformance (DMARC) and ...

The rules, formats and functions for exchanging messages between the components of a messaging system. The most widely used messaging protocol is the Internet's Simple Mail Transfer Protocol (SMTP).

In a nutshell: Matrix is an open standard designed to enable seamless and interoperable communication among various service providers. The protocol aspires to be for instant messaging what the Simple ...