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Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

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Chapter 5      Using Message Filters to Enforce Email Policies
5-424
Cisco IronPort AsyncOS 7.1 for Email Advanced Configuration Guide
OL-22164-02
Another Drop Spoofed Domain Filter
Summary: Anti domain spoof filter:
reject_domain_spoof: 
if (recv-listener == "MailListener") {
  insert-header("X-Group", "$Group");
  if ((mail-from == "@test\\.mycompany\\.com") AND (header("X-Group") != 
"RELAYLIST")) {
    notify("me@here.com");
    drop();
    strip-header("X-Group");
}
Detect Looping Filter
This filter is used to detect, stop, and determine what is causing, a mail loop. This 
filter can help determine a configuration issue on the Exchange server or 
elsewhere.
drop ();
}
External_Loop_Count:
if (header("X-ExtLoop1")) {
  if (header("X-ExtLoopCount2")) {
    if (header("X-ExtLoopCount3")) {
      if (header("X-ExtLoopCount4")) {