Cisco Cisco Email Security Appliance X1070 故障排查指南
What can I do about spam with no subject or
message body
message body
Document ID: 118247
Contributed by Stephan Fiebrandt and Chris Haag, Cisco TAC
Engineers.
Aug 12, 2014
Engineers.
Aug 12, 2014
Contents
Introduction
What can I do about spam with no subject or message body?
What can I do about spam with no subject or message body?
Introduction
This document describes how to reduce the impact of spam with empty message bodies.
What can I do about spam with no subject or message
body?
body?
While Cisco Anti−Spam creates and publishes rules to combat spam attacks that appear like bounce messages
(blank sender), there is a message filter which can help reduce the impact.
(blank sender), there is a message filter which can help reduce the impact.
blankSpam:
if ((subject == "^$") AND (header("To") == "^$")) AND (body−size < 3072)
{
insert−header("X−Spam", "$FilterName"); quarantine("Policy");
}
Updated: Aug 12, 2014
Document ID: 118247