[duck]

Ah, okay... that makes sense and is a great setup. Did you run into any issues with spam filters when you made that switch?

[petercooper]

Nope, it's what Mailchimp, etc., do. All the outgoing links just fly through their server on the same hostname. We do the same with our hostname.

I have evidence that Google follows these links though, because if you link to a "bad" site even through a redirector, Google notices and will throw you into spam or say you're phishing, etc :-)