[andygrif]

They don't get blacklisted for no reason. As Paul suggested it above it might have been the DNS changes that took place the other day...in which case it was firmly in ntl's court.

I agree that sometimes things will get classified as spam incorrectly, but when this is happening on a regular basis it makes the system unreliable and people who rely on their mail, like me, have to look elsewhere for their providers.