Allow extra headers to be provided.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@1597 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/samskivert/src/java/com/samskivert/net/MailUtil.java

@@ -80,6 +80,17 @@ public class MailUtil
     public static void deliverMail (String[] recipients, String sender,
                                     String subject, String body)
         throws IOException
+    {
+        deliverMail(recipients, sender, subject, body, null, null);
+    }
+
+    /**
+     * Delivers the supplied mail, with the specified additional headers.
+     */
+    public static void deliverMail (String[] recipients, String sender,
+                                    String subject, String body,
+                                    String[] headers, String[] values)
+        throws IOException
     {
         if (recipients == null || recipients.length < 1) {
             throw new IOException("Must specify one or more recipients.");
@@ -97,6 +108,10 @@ public class MailUtil
                 message.addRecipient(Message.RecipientType.TO,
                                      new InternetAddress(recipients[ii]));
             }
+            int hcount = (headers == null) ? 0 : headers.length;
+            for (int ii = 0; ii < headers.length; ii++) {
+                message.addHeader(headers[ii], values[ii]);
+            }
             message.setSubject(subject);
             message.setText(body);
             Transport.send(message);