Nested Exception

Exception: System.Net.Sockets.SocketException
Message: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 172.23.96.44:80
Source: System
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)


16824 10:41:55 ERROR Exception: Sitecore.EmailCampaign.Model.Web.Exceptions.NonCriticalException
Message: Failed to download string content, URL: http://192.20.96.44/?sc_itemid=%7B899A10F7-89D3-48A6-8D7D-63A350B7E7DB%7D&sc_lang=en&sc_device=%7BFE5D7FDF-89C0-4D99-9AA3-B5FBD009C9F3%7D&ec_database=master&ec_id=14532115AEB24E4481A2108DB1BCD512&ec_message_id=53A6EF153B84427ABC08003458A76091, Use IIS Credentials: True, UserAgent: ECM Dispatch
Source: Sitecore.EmailCampaign
   at Sitecore.Modules.EmailCampaign.Core.WebContent.DownloadString(String url, Boolean useIisCredentials, String userAgent)
   at Sitecore.Modules.EmailCampaign.Messages.WebPageMail.GetMessageBody(Boolean preview)
   at Sitecore.EmailCampaign.Cm.MessageInfo.FillContentEditorInfo()