>The web form results in an automated email saying, "Your ip addresses are not >blocked." from Comcast. This is a difficult group to interact with.
Last time I went through this I found they were using some 3rd party scoring company. And for a small server like mine, I wasn’t even on that companies radar, much less at a volume that could get me delisted. I throttled deliveries to them and that seems to have cured it. I used to have a large opt-in mail-out list I managed for a motorsports org that had a lot of Comcast addresses. I’ve since stopped providing that service.
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