From 6efaa1f7d0affe91e0d654fa00943bed8af6ed3c Mon Sep 17 00:00:00 2001
From: Erin Dachtler <download333@gmail.com>
Date: Sun, 4 Dec 2016 19:27:46 -0800
Subject: [PATCH 1/2] Added DKIM signing options

---
 package.json |  1 +
 sendmail.js  | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/package.json b/package.json
index f3c8a37..1ca6164 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "node": ">=0.6.0"
   },
   "dependencies": {
+    "dkim-signer": "^0.2.2",
     "mailcomposer": "^3.10.0"
   },
   "devDependencies": {
diff --git a/sendmail.js b/sendmail.js
index 6731344..d5baf62 100644
--- a/sendmail.js
+++ b/sendmail.js
@@ -1,5 +1,6 @@
 var tcp = require('net');
 var dns = require('dns');
+var DKIMSign = require('dkim-signer').DKIMSign;
 var CRLF = '\r\n';
 
 function dummy(){}
@@ -16,6 +17,8 @@ var exports = module.exports = function(options) {
     warn: console.warn,
     error: console.error
   })
+  var dkimPrivateKey = (options.dkim || {}).privateKey
+  var dkimKeySelector = (options.dkim || {}).keySelector || 'dkim'
 
   /*
    *   邮件服务返回代码含义 Mail service return code Meaning
@@ -275,10 +278,18 @@ var exports = module.exports = function(options) {
         callback(err, null);
         return;
       }
+      if (dkimPrivateKey) {
+        var signature = DKIMSign(message, {
+            privateKey: dkimPrivateKey,
+            keySelector: dkimKeySelector,
+            domainName: srcHost
+        });
+        message = signature + '\r\n' + message;
+      }
       for (var domain in groups) {
         sendToSMTP(domain, srcHost, from, groups[domain], message, callback);
       }
-    })   
+    })
     // COMMENTED OUT BY GP BECAUSE I SAW NO USE FOR IT
     // var domainsCount = Object.keys(groups).length
     // var doneCount

From 8e4f235a99fbfe28bd01900ecc2b4bc74cbd194f Mon Sep 17 00:00:00 2001
From: Erin Dachtler <download333@gmail.com>
Date: Sun, 4 Dec 2016 19:55:48 -0800
Subject: [PATCH 2/2] Added DKIM example

---
 examples/dkim.js | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 examples/dkim.js

diff --git a/examples/dkim.js b/examples/dkim.js
new file mode 100644
index 0000000..b244c8a
--- /dev/null
+++ b/examples/dkim.js
@@ -0,0 +1,19 @@
+var fs = require('fs');
+var sendmail = require('../sendmail')({
+  silent:true,
+  dkim: {
+    privateKey: fs.readFileSync('dkim-private.pem', 'utf-8'),
+    keySelector: 'mydomainkey'
+  }
+});
+
+sendmail({
+    from: 'test@yourdomain.com',
+    to: 'info@yourdomain.com',
+    replyTo: 'jason@yourdomain.com',
+    subject: 'MailComposer sendmail',
+    html: 'Mail of test sendmail ',
+  }, function(err, reply) {
+    console.log(err && err.stack);
+    console.dir(reply);
+});