From bbdc193f05cb2f1624d6c7bbffd27f8060de35c8 Mon Sep 17 00:00:00 2001 From: Micah Date: Tue, 12 Jul 2016 11:20:58 -0400 Subject: Block ip-based helo at MTA (#8139). Numeric helo is a very strong indicator of spam. When this is blocked, a very significant amount of spam stops. Change-Id: Ieb340190faf37638950d1aa60b52268659e0b7f6 --- puppet/modules/site_postfix/files/checks/helo_access.pcre | 2 ++ 1 file changed, 2 insertions(+) create mode 100644 puppet/modules/site_postfix/files/checks/helo_access.pcre (limited to 'puppet/modules/site_postfix/files/checks') diff --git a/puppet/modules/site_postfix/files/checks/helo_access.pcre b/puppet/modules/site_postfix/files/checks/helo_access.pcre new file mode 100644 index 00000000..4ebd42e6 --- /dev/null +++ b/puppet/modules/site_postfix/files/checks/helo_access.pcre @@ -0,0 +1,2 @@ +!/[[:alpha:]]/ REJECT Numeric HELO is a sign of spam, please contact us if this is in error + -- cgit v1.2.3