1 files changed, 12 insertions, 0 deletions
diff --git a/SendGrid/SendGridMail/IHeader.cs b/SendGrid/SendGridMail/IHeader.cs
index f55eadd..3ec7911 100755
--- a/SendGrid/SendGridMail/IHeader.cs
+++ b/SendGrid/SendGridMail/IHeader.cs
@@ -11,6 +11,11 @@ namespace SendGridMail
     /// </summary>
     public interface IHeader
     {
+		/// <summary>
+		/// Gets the array of recipient addresses from the X-SMTPAPI header
+		/// </summary>
+		IEnumerable<string> To { get; }
+
         /// <summary>
         /// This adds a substitution value to be used during the mail merge.  Substitutions
         /// will happen in order added, so calls to this should match calls to addTo in the mail message.
@@ -20,6 +25,13 @@ namespace SendGridMail
         void AddSubVal(String tag, IEnumerable<String> substitutions);
 
         /// <summary>
+        /// This adds the "to" array to the X-SMTPAPI header so that multiple recipients
+        /// may be addressed in a single email. (but they each get their own email, instead of a single email with multiple TO: addressees)
+        /// </summary>
+        /// <param name="addresses">List of email addresses</param>
+        void AddTo(IEnumerable<string> addresses);
+
+        /// <summary>
         /// This adds parameters and values that will be bassed back through SendGrid's
         /// Event API if an event notification is triggered by this email.
         /// </summary>