From Debian package 0.0.20080702-8

Allow $1_mail_t to read proc_t:file (for Postfix)

Index: policy/modules/services/mta.if
===================================================================
--- policy/modules/services/mta.if.orig
+++ policy/modules/services/mta.if
@@ -96,6 +96,8 @@
 
 	miscfiles_read_localization($1_mail_t)
 
+	kernel_read_system_state($1_mail_t)
+
 	optional_policy(`
 		exim_read_log($1_mail_t)
 		exim_append_log($1_mail_t)