I work with email and Postfix. On every mailing machine I have Postfix setup on, I have at least 2 instances, sometimes more (in fact, sometimes its as many as 6 instances). I was recently setting up a new set of mailers and decided to give Postfix multi-instance seutp a try. It was excellent. There …
By eric
On the same day that Goodmail removed Yahoo! from its pool, it added the vastness of Microsoft domains. These domains include hotmail.com, live.* and msn.com. The addition of Microsoft to the Goodmail community is a good thing because it means that Microsoft is starting to play ball in the email community. However it comes as …
By eric
So as of today, Yahoo! will no longer be accepting Goodmail imprinted messages. There is currently no press release from Goodmail, but I am sure one will be forthcoming. The latest reference to the on goings is listed here in one of their recent blog posts. Goodmail claims that they are doing everything possible to …
By eric
This is the most comprehensive list of feedback loops that I have been able to find and put together. If there are others that you know of, please let me know and I’ll add them. The other item that should be noted is that some ISPs don’t have a feedback loop and just respond to …
By eric
This post is a little more of a rant than I usually make, but I think its warranted. If you don’t know what a feedback loop is, read here. I’m not sure who thinks its a good idea to replace all instances of an email addresses in a feedback loop with [redacted]@feedbackloopcompany.com, but it is …
By eric
This is the first in a multipart series on better SPAM fighting through log parsing. I have found that better Systems Administration can usually be achieved through proper log handling and analysis. In fact, I will use the data from one of the secondary mail servers in my personal mail setup in order to demonstrate …
By eric
I was looking for way to make my SPAM filtering more effective and came across this great tool from Mike Cappella called amavisd-logwatch. On his web site, it says he doesn’t like waiting for package maintainers, so its just a tarball. Since my installs are Debian based, I created a deb for it. My .deb …
By eric
I spent a while trying to set up DKIM with Postfix on CentOS 5.2. I read the HOWTOs on HOWToForge written by Andrew Colin Kissa (aka TopDog) who subsequently helped me towards getting this setup working. My setup is that I have a mail spooler and multiple mail senders. This is to say that the …
By eric
