use user creditials for email login id & password ofor intranet applications

[GoogleCodeExporter]

for intranet application apply user credentials to email server 

avoid hard coding and exposing user id's and passwords

   <errorMail 
            from="elmah@example.com" 
            to="admin@example.com" 
            subject="..."
            priority="Low|Normal|High"
            async="true|false"
            smtpPort="25"
            smtpServer="smtp.example.com" 
            useSsl="true|false"
            userName="johndoe"     <-- already signed in to server 
            password="secret"      <-- is it possible to use CredentialCache.DefaultNetworkCredentials
            noYsod="true|false" />

Original issue reported on code.google.com by smagli...@hotmail.com on 21 Oct 2015 at 10:21