diff --git a/lib/email.js b/lib/email.js
index <HASH>..<HASH> 100644
--- a/lib/email.js
+++ b/lib/email.js
@@ -199,8 +199,6 @@ Email.prototype.send = function send (callback) {
   var parsedUrl = parse(self.amazon);
   var headers = self.headers();
 
-  headers['Connection'] = 'Keep-Alive';
-
   var options = {
       uri: self.amazon
     , host: parsedUrl.hostname
@@ -215,6 +213,8 @@ Email.prototype.send = function send (callback) {
   };
   var signedOpts = aws4.sign(options, credentials);
 
+  signedOpts.headers['Connection'] = 'keep-alive';
+
   debug('posting: %j', signedOpts);
 
   request(signedOpts, function (err, res, data) {
Make work with eu-central-1 region