On Thu, 21 Feb 2019 at 13:34, Marc Lijour via talk <talk@gtalug.org> wrote:
Does anyone has insights about dealing with Spamhaus?
I'm getting increasingly frustrated by being listed without explanation. I run a very low bandwidth mail server and a website for my business. I am running postfix with SPF, DKIM, and DMARC. I'd like to know what I am missing.
Do you have a permanent static IP address? If not, you may occasionally be picking up a "dirty" IP address. Also, it seems to me that even permanent static IP addresses are not made the same. I get a feeling that some spam databases do not "like" certain ranges of IP addresses. Although I have no direct evidence of it, I suspect that these spam database sites run periodic checks on how much spam a subnet produces and when it exceeds some threshold the entire subnet is marked "dirty".