I've received a positive on the CBL check from support.
That kinda gives me pause. To me that's a very un-Dreamhosty thing to do. Not that they're checking against a blacklist but that I don't know anything about it and had to find out from a client's troubles. I quite like the idea of checking against some of the better lists before delivery, I'm sure it does wonders for performance around here, but...
Dreamhost has always been very much on the side of not messing with their customer's property and keeping them well informed. This situation seems against both, and wholely uncharacteristic.
I'm harping here because I've not found any info about it anywhere else besides dragging it out in a support conversation. Maybe this post will help people find an answer quicker if they search.
I'd love to hear from a Happy Dreamhost Honcho on this, maybe let us know what blacklists are checked against so we can be informed and not look so silly in the future?