Tag: Mta
What is a Honeypot in Email Security Terms?
A Honeypot is, by definition, a decoy or a trap whose purpose is to detect and identify unauthorized use in order to prevent breaches. In Email Security, a Honeypot is a SMTP server setup to process a single domain (or multiple domains) to gather emails all day long. (Dec 18, 2009)
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)
Botnet Generated Spam
Botnets are networks of compromised machines that are under the command and control (C&C) of one entity - the botnet master. They are typically used for crimes such as denial-of-service attacks, identity thefts, phishing and, most commonly, for sending spam. Current botnets have easy-to-use HTML-based interfaces and can be rented out by spammers for their various spamming campaigns. Researchers reported that during 2008, 85% of spam was generated by six botnets (Mega-D, Srizibi, Storm, Rustock, Pushdo and Cutwail). (Nov 06, 2009)
SPF woes with third party services … a workaround.
Many people use SPF (Sender Policy Framework) as an anti-spoofing measure. They create an SPF record in their DNS zone for their domain. From time to time though, some customers will do business or use third party services that will send out Email on their domain's behalf and unfortunately, this will cause recipient MTAs to hard-fail or soft-fail these messages. (Sep 04, 2009)
