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".