Hello everyone. I have been mailing for about 6 months and had great success with google on a /24 using 5 domains using a "grouping method". Recently I noticed that when trying to mail off a /26 using 3 domains and mailing across the range I have spurts of success with google. I will get in fine then after about a few hours I get 550'd. Google blocks by domain so I dont understand why some of my IPs are being listed. Am I doing this wrong? Appreciate any positive feedback. thanks guys!