Merge pull request #92 from ActiveCampaign/MS-S3150

updating MS S3150

data/codes/550.json

@@ -164,7 +164,7 @@
           "status": "5.7.1-2",
           "response": "smtp;550 5.7.1 Unfortunately, messages from [x.xx.xx.xx] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [#.eop-nam02.prod.protection.outlook.com]",
           "severity": 3,
-          "description": "Sometimes this bounce isn't related to an IP block. Check your Return-Path (envelope from) domain as well for any current block listings.",
+          "description": "This is Microsoft's way of throttling your sending IP, possibly related to IP reputation classification. It should automatically expire on its own and is generally caused by sending too much traffic too fast.",
           "links": ["https://sendersupport.olc.protection.outlook.com/pm/troubleshooting.aspx"]
         },
         {