I published the following diary on isc.sans.edu: “Keep an Eye on Disposable Email Addresses“:
In many organisations, emails still remain a classic infection path today. The good old email is still today a common communication channel to exchange information with people outside of the security perimeter. Many security controls are in place to reduce the number of malicious emails landing in users’ mailboxes. If, from a network perspective, firewalls inspect traffic in both directions (“egress†and “ingress†filters), it’s not always the case with email flows. They are often just allowed to go out through local MTA’s (Mail Transfert Agents)… [Read more]