How about this one?
Starting January 1, 2015, Delta will limit the number of miles a SkyMiles member can transfer from a single transfer partner (e.g., American Express Membership Rewards or Starwood Preferred Guest) into a single Delta SkyMiles account to 250,000 miles per calendar year. This change will apply to all their partners that allow you to convert points into SkyMiles.
source thepointsguy (since I just copied and pasted it)
http://thepointsguy.com/2014/10/delt...#ixzz3Sa3VnTzP