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Back in 2009, I wrote an article about country-based DNSBL blocking. You can find the original article here:https://www.vircom.com/security/country-based-blocking/ Thankfully, the person who runs the countries.nerd.dk blacklist is still around and operational and you can still use their country-based DNSBL zones to block certain countries from sending mail to you. Depending on the type of organizationRead more

Graymail is basically bulk Email that may have been requested at one point via an opt in but over time, interest in this type of Email has diminished and the end user eventually considers these messages as annoyances or spam. Another name for it is BACN (Or Bacon). Wikipedia defines Graymail as having the followingRead more

If you’re running an exchange server (or any other type of mail server) on-premise, you should consider putting your spam filtering gateway outside your network, either at a co-location (if it’s a physical server), or, if it’s a software package, on a VPS provider (Virtual Private Server). Why? The reason is simple: by doing this,Read more

In September of 2012, Microsoft announced that they were discontinuing Forefront Protection for Exchange in favor of a cloud based solution (Exchange Online Protection), definition updates would continue into 2015.This is pretty much in line with their cloud strategy where Microsoft is trying to leverage its Office 365 infrastructure to provide cloud-based spam filtering asRead more

There’s something that has really gnawed at me for a while. Call it guilt. I’m a geek, a techie who has been dealing with technology since I was 11 years old. I’m 46 years old today and making a good living at it as an IT guy and programmer on the side. I don’t know howRead more