Critical problem in ManageErrors.ExceptionHandler()
The system could not complete handling an exception.

Error in Error Handler: ERROR - Expecting: 250. Recieved: 550 syntax error, no userid

   at OpenSmtp.Mail.Smtp.SendRecipientList(NetworkStream& nwstream, ArrayList recipients)
   at OpenSmtp.Mail.Smtp.SendMail(MailMessage msg)
   at ManageNotifications.SendHTMLMessage(String ToEmail, String FromEmail, String Subject, String Body)
   at ManageErrors.ExceptionHandler(Exception ex)

Original Error

No web service found at: /membership/WebServices/Materials.asmx.

   at System.Web.Script.Services.WebServiceData.GetWebServiceData(HttpContext context, String virtualPath, Boolean failIfNoData, Boolean pageMethods)
   at System.Web.Script.Services.WebServiceClientProxyGenerator.GetClientProxyScript(HttpContext context)
   at System.Web.Script.Services.RestClientProxyHandler.ProcessRequest(HttpContext context)
   at System.Web.Script.Services.ScriptHandlerFactory.HandlerWrapper.ProcessRequest(HttpContext context)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)