diff --git a/responders/Mailer/Mailer.json b/responders/Mailer/Mailer.json
index 4f0a3dd01..459adff51 100644
--- a/responders/Mailer/Mailer.json
+++ b/responders/Mailer/Mailer.json
@@ -23,6 +23,14 @@
       "multi": false,
       "required": true,
       "defaultValue": "localhost"
+    },
+    {
+      "name": "smtp_port",
+      "description": "SMTP server port",
+      "type": "number",
+      "multi": false,
+      "required": true,
+      "defaultValue": "25"
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/responders/Mailer/mailer.py b/responders/Mailer/mailer.py
index 33eba388a..3c1627111 100755
--- a/responders/Mailer/mailer.py
+++ b/responders/Mailer/mailer.py
@@ -12,6 +12,8 @@ def __init__(self):
         Responder.__init__(self)
         self.smtp_host = self.get_param(
             'config.smtp_host', 'localhost')
+        self.smtp_port = self.get_param(
+            'config.smtp_port', '25')
         self.mail_from = self.get_param(
             'config.from', None, 'Missing sender email address')
 
@@ -46,7 +48,7 @@ def run(self):
         msg['To'] = mail_to
         msg.attach(MIMEText(description, 'plain'))
 
-        s = smtplib.SMTP(self.smtp_host)
+        s = smtplib.SMTP(self.smtp_host, self.smtp_port)
         s.sendmail(self.mail_from, [mail_to], msg.as_string())
         s.quit()
         self.report({'message': 'message sent'})