Security researchers have discovered a new critical vulnerability in the OpenSMTPD email server. An attacker could exploit it remotely to run shell commands as root on the underlying operating system.

The Linux-based ELF backdoor is targeting cloud workloads across providers, using SMTP-based C2 and typosquatted Alibaba ...

I currently have an Exchange 5.5 server that receives it's internet mail from an IIS 5.0 SMTP relay.<BR><BR>Spam is an increasingly large problem, so I'd like to look at putting in an SMTP relay that ...

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 ...