1 files changed, 2 insertions, 1 deletions
diff --git a/SendGrid/SendGridMail/ISendGrid.cs b/SendGrid/SendGridMail/ISendGrid.cs
index c73cd99..81952d3 100755
--- a/SendGrid/SendGridMail/ISendGrid.cs
+++ b/SendGrid/SendGridMail/ISendGrid.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Net;
 using System.Net.Mail;
 using System.Net.Mime;
 using System.Text;
@@ -171,6 +172,6 @@ namespace SendGridMail
         void EnableBypassListManagement();
         #endregion
 
-        void Mail();
+        void Mail(NetworkCredential credentials);
     }
 }