This document will describe how to set up HeaderManager for Clearswift MAILsweeper for SMTP version 5.x There are three steps:

 

1. Create an executable scenario

2. Create an Advanced Path

3. Activate the changes

 

How to use HeaderManager

Header Manager can be used to remove confidential information from headers in SMTP messages.

It's important to have at least a basic knowledge about the SMTP format and how MIME works. You can get this information by reading up on reliable Internet sources, by reading books or by taking courses.

Most often, Header Manager is used to remove or replace "Received:" headers.

Received headers are used for two important reasons: to track mail and to stop message loops. Message loops occur when a message is send back and forth. Many mail servers count the number of Received headers messages and when the total is higher than a pre-determined number, the message is not delivered.

Removing all Received headers may lead to never ending message loops, you should make sure that not all headers are removed. Replacing the value of Received headers is the safest way to remove information about internal mail systems and mail senders from these headers while maintaining the ability to stop mails based on the number of received headers.

The readme.txt file contains technical information about installing HeaderManager.

 

Advanced HeaderManager use

For organizations who have special configuration demands, we recommend to consult an SMTP/MIME specialist.

When in doubt about the effects of changes to headers, a specialist should be consulted.

NetCon, distributor of HM, offers a MAILsweeper course which includes training on the use of HeaderManager.