Per Jessen wrote:
It would be more correct to say that they are _listing_ an entire AS - after all, they're not blocking anything.
It looks like Sunrise might be listed on their level3 list:
This blacklist has been created for HARDLINERS. It can, and probably will cause collateral damage to innocent users when used to block email. UCEPROTECT-Level 3 lists all IP's within an ASN if more than 100 IP's, but also a minimum of 0.2% of all IP's allocated to this ASN got Level 1 listed within the last 7 days.
Using that for blocking is asking for trouble. We're not even using it for scoring, although we have considered it.
/Per Jessen, Herrliberg