Document information
| Document ID: | 4661 |
|---|---|
| Subject: | User tracking filter |
| Creation date: | 12/14/15 4:35 PM |
| Last modified on: | 8/13/18 4:08 PM |
User tracking filter
Problem
Some of the emails getting blocked have the following reason:
Email is referring to www.xyz.com, which contains user tracking information.
Explanation
Consider the following raw source code of a sample email.
Subject: Re: Your message
To: scott@xyzDomain.com
From: Greg Brown <greg@acme.com>
Date: Tue, 29 May 2012 09:05:33 -0400
Content-type: text/html; CHARSET=US-ASCII
<html>
<body>
Scott,
<img src="http://www.syasdf.com/tracker?u=scott@xyzDomain.com">Hello</a>
</body>
</html>
To: scott@xyzDomain.com
From: Greg Brown <greg@acme.com>
Date: Tue, 29 May 2012 09:05:33 -0400
Content-type: text/html; CHARSET=US-ASCII
<html>
<body>
Scott,
<img src="http://www.syasdf.com/tracker?u=scott@xyzDomain.com">Hello</a>
</body>
</html>
This sample message contains a URL that has the user's email address. The sender will know if the recipient clicks the link, which serves as an acknowledgment and a validation of the email address. This mechanism is used by many spammers to find out if their spamming campaign is a success.
The URL User detector custom rule detects such messages and assigns a score. If you have messages going in the wrong category, try adjusting the score for this filter. Click Filter Management > Content Filters > Custom Filters to access this filter.
Add a comment to this document
Do you have a helpful tip related to this document that you'd like to share with other users?
Important: This area is reserved for useful tips. Therefore, do not post questions here. Instead, use our public forums to post questions.