I would like to inject a tracking header in an email before it is sent. Nothing malicious, just something I can use to uniquely identify a specific email that was sent from our server's web application.
Here's the use case narrative: We build web based applications where we need to be able to audit: "Did so-and-so get an email?" When the user is outside our system, the only thing we can verify is that the recipient server on the other end responded with a 250 OK. So, I need to be able to pair that 250 OK response with a specific email that was generated out of our system. To do that, I am planning on writing a milter in python that will look at the headers (before or after it is sent, I haven't decided on that), and then figure out the post-send disposition (250 OK, 550 5.7.1 Rejected, etc...) and update the database. My current thought on how to do this would be to add a header to the email that corresponds to the id that email has in the database. Just an integer value. (THe secuirty guy in me says use a nonce instead. It could be either). So, the first part of my task is: can I add a header to the email that will safely be ignored by everything? Something like: "X-Tracking: 1234\r\n"? If the answer to that is "Yes", then my next task will be to research what hooks are available for a miter to look at the results of a sent mail so I can get the remote server response to store in the database. Does anyone have any thoughts on this? I am completely open to scrapping my current idea and adopting a better way. I have no pride in the concept. I just want something that works well and is an elegant approach. Thanks in advance, Michael -- Michael Munger, dCAP, MCPS, MCNPS, MBSS High Powered Help, Inc. Microsoft Certified Professional Microsoft Certified Small Business Specialist Digium Certified Asterisk Professional mich...@highpoweredhelp.com
