added note about rate limits on uploading recipients

eschallock · eschallock · commit 203f9d607851 · 2016-06-10T14:33:15.000-06:00
diff --git a/source/API_Reference/Web_API_v3/Marketing_Campaigns/contactdb.apiblueprint b/source/API_Reference/Web_API_v3/Marketing_Campaigns/contactdb.apiblueprint
@@ -419,6 +419,8 @@ If you make a request to upload a duplicate recipient and your request would mak
 
 ### Add Single Recipient [POST]
 
+The rate at which recipients may be uploaded is limited to 3 requests every 2 seconds. Recipients may be uploaded in batches of 1000 per request. This results in a maximum upload rate of 1500 recipients per second.
+
 + Request (application/json)
 
      + Body
