1 files changed, 21 insertions, 0 deletions
diff --git a/SendGrid/SendGridMail/IHeader.cs b/SendGrid/SendGridMail/IHeader.cs
new file mode 100755
index 0000000..a9464ed
--- /dev/null
+++ b/SendGrid/SendGridMail/IHeader.cs
@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Mail;
+using System.Text;
+
+namespace SendGridMail
+{
+    public interface IHeader
+    {
+        void AddTo(IEnumerable<String> recipients);
+        void AddSubVal(String tag, IEnumerable<String> substitutions);
+        void AddUniqueIdentifier(IDictionary<String, String> identifiers);
+        void SetCategory(String category);
+        void Enable(String filter);
+        void Disable(String filter);
+        void AddFilterSetting(String filter, IEnumerable<String> settings, String value);
+        void AddHeader(MailMessage mime);
+        String AsJson();
+    }
+}