diff --git a/README b/README
index cdce11c..9af9665 100644
--- a/README
+++ b/README
@@ -55,6 +55,19 @@ There are four special headers that simple_mailer processes:
 
 All other headers are used verbatim in the message.
 
+== Configuration
+
+You can pass in options just like with the Mail gem.
+
+  SimpleMailer.smtp_settings = {
+    :address => "smtp.gmail.com",
+    :port => 587,
+    :domain => "localhost",
+    :user_name => "bob",
+    :password => "secret",
+    :authentication => :plain,
+  }
+
 == Testing
 
 Testing support is probably the main reason to use simple_mailer over
diff --git a/lib/simple_mailer.rb b/lib/simple_mailer.rb
index 2164c74..f126813 100644
--- a/lib/simple_mailer.rb
+++ b/lib/simple_mailer.rb
@@ -15,6 +15,7 @@ module SimpleMailer
   extend self
 
   DEFAULT_SMTP_HOST = 'localhost'.freeze
+  DEFAULT_SMTP_DOMAIN = 'localhost'.freeze
 
   # The array of emails sent
   def self.emails_sent
@@ -37,6 +38,8 @@ def self.test_mode?
 
   # The smtp server to sent email to
   attr_accessor :smtp_server
+  # Custom SMTP configuration for any service (taken from the "mail" gem)
+  attr_accessor :smtp_settings
   
   # The emails sent in test mode.  Is an array of arrays.  Each
   # element array is a array of three elements, the message, from address,
@@ -91,7 +94,11 @@ def _send_email(msg, from, to)
     if SimpleMailer.test_mode?
       test_mode_send_email(msg, from, to)
     else
-      Net::SMTP.start(smtp_server || DEFAULT_SMTP_HOST){|s| s.send_message(msg, from, to)}
+      domain             = smtp_settings[:domain] || DEFAULT_SMTP_DOMAIN
+      username, password = smtp_settings.values_at(:user_name, :password)
+      authentication     = smtp_settings[:authentication]
+
+      smtp.start(domain, username, password, authentication){|s| s.send_message(msg, from, to)}
     end
   end
 
@@ -100,4 +107,14 @@ def _send_email(msg, from, to)
   def test_mode_send_email(msg, from, to)
     emails_sent << [msg, from, to]
   end
+
+  def smtp
+    address = smtp_server || smtp_settings[:address] || DEFAULT_SMTP_HOST
+    port    = smtp_settings[:port] || 25
+
+    Net::SMTP.new(address, port).tap do |smtp|
+      smtp.enable_starttls_auto if smtp_settings[:enable_starttls_auto] == false
+      smtp.enable_tls if smtp_settings[:tls] || smtp_settings[:ssl]
+    end
+  end
 end