MX records being used to block spam
Apr 20, 2009 by Paul WhiteRecently I have noticed that the open rates of a few of my client's newsletters are going down. This is leading me to believe that most free mail servers are using yet another litmus test to detect and block spam. Unfortunately those of us with legit bulk emails campaigns are also feeling the pinch.
Reverse DNS, SPF, Grey listing, and RBL Guides
Aug 31, 2008 by Paul WhiteIf you run a mail server having a complete understanding of these technologies and how they work very important. I go over the details of each why they are used.
Stop Spam with Grey Listing in SmarterMail
Apr 17, 2008 by Paul WhiteFor the longest time I had the wrong definition of what grey listing is. Once I figured out what it really is, and implemented it on my server running SmarterMail 4.x. I saw a huge drop in spam. If you hate spam, this might very well solve all your problems. Read this article for information on how it works and why it works.
Dictionary attack IP list
Mar 31, 2008 by Paul WhiteThis is a list of IPs that tried to send email to users that don't exist on one of my client's sites. SmarterMail can be setup to reject these IPs after X failed attempts. Feel free to add these to your blacklists.
Stop Spam in SmarterMail with RBL SBL and BL
Feb 8, 2008 by Paul White
Once you get a VPS box from HostMySite and you are running your own mail server, the first thing you will notice is how much spam is getting through. This is because there are not advanced spam filters setup when Smartermail was installed on your VPS. So its time to take things into your own hands. Here is the list of RBL SBL BL servers I use to block 99% of all spam. It works so well I was able to cancel my account with postini.