Tag: Ip
Deep header inspection: use with caution
Some anti-spam tools will actually look at the reputation of IP addresses in each of the received headers of an email. Reputation mechanisms usually involve multiple sources, e.g., DNSBLs and Honeypot-driven reputation services. (Apr 19, 2010)
Reverse DNS checking: Is it safe to use?
Every time I do a setup with a customer, the question always comes up: Should we use Reverse DNS checking or not when configuring connection-level blocking security measures? (Dec 04, 2009)
