I hit an interesting, and irritating, wrinkle in the last day.
I use Spamgourmet to give every company I deal with a different address. After placing an order and doing the usual of giving them an address of their own, I found that in this case, the service claims to have forwarded two messages from the company in question, but I never received them.
I'm trying to see if I can get the company to re-send them, but here is the odd bit: I sent myself a message from a different origin account to that address, and it arrived at my protected address, but it said it was the first message (1 of 20). I didn't notice at first, but the while the service incremented the Forwarded counter, it did not increment the Remaining counter until my test message went through. It now reads 3 forwarded, 19 remaining.
This is the first failure I can remember. Anyone have any ideas?