[GTALUG] Spamhaus block

[Val Kulkov]

On Thu, 21 Feb 2019 at 13:34, Marc Lijour via talk <talk at 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".
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