diff --git a/modules/exploits/unix/smtp/exim4_string_format.rb b/modules/exploits/unix/smtp/exim4_string_format.rb
index 8b2fa121b4..0b7a935079 100644
--- a/modules/exploits/unix/smtp/exim4_string_format.rb
+++ b/modules/exploits/unix/smtp/exim4_string_format.rb
@@ -84,6 +84,11 @@ class Metasploit3 < Msf::Exploit::Remote
 			'DisclosureDate' => 'Dec 7 2010', # as an actual security bug
 			'DefaultTarget'  => 0))
 			
+			register_options([
+				OptString.new('MAILFROM', [ true, 'FROM address of the e-mail', 'root@localhost']),
+				OptString.new('MAILTO', [ true, 'TO address of the e-mail', 'postmaster@localhost'])
+			], self.class)
+						
 			register_advanced_options([
 				OptString.new("SourceAddress", [false, "The IP or hostname of this system as the target will resolve it"])
 			], self.class)