diff --git a/mantis-0.19.2-iis.patch b/mantis-0.19.2-iis.patch
deleted file mode 100644
index 140ba81..0000000
--- a/mantis-0.19.2-iis.patch
+++ /dev/null
@@ -1,18 +0,0 @@
---- mantis-0.19.2/config_defaults_inc.php.iss	2004-12-11 08:21:52.000000000 +0100
-+++ mantis-0.19.2/config_defaults_inc.php	2005-03-07 17:47:41.000000000 +0100
-@@ -245,7 +245,7 @@
- 
- 	# set to OFF to disable email check
- 	$g_validate_email		= ON;
--	$g_check_mx_record		= OFF;	# Not supported under Windows.
-+	$g_check_mx_record		= ON;	# Not supported under Windows.
- 
- 	# if ON, allow the user to omit an email field
- 	# note if you allow users to create their own accounts, they
-@@ -1474,4 +1474,4 @@
- 	# NOTE: These are meaningless under Windows! Just ignore them!
- 	$g_dot_tool							= '/usr/bin/dot';
- 	$g_neato_tool						= '/usr/bin/neato';
--?>
-\ No newline at end of file
-+?>
diff --git a/mantis-1.0.0a3-iis.patch b/mantis-1.0.0a3-iis.patch
new file mode 100644
index 0000000..8f5d1aa
--- /dev/null
+++ b/mantis-1.0.0a3-iis.patch
@@ -0,0 +1,11 @@
+--- mantis-1.0.0a3/config_defaults_inc.php.iis
++++ mantis-1.0.0a3/config_defaults_inc.php
+@@ -259,7 +259,7 @@
+ 
+ 	# set to OFF to disable email check
+ 	$g_validate_email		= ON;
+-	$g_check_mx_record		= OFF;	# Not supported under Windows.
++	$g_check_mx_record		= ON;	# Not supported under Windows.
+ 
+ 	# if ON, allow the user to omit an email field
+ 	# note if you allow users to create their own accounts, they