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8.5

Keep Return-Path header in Postfix

Asked by karlsfre in Postfix, Simple Mail Transfer Protocol (SMTP)

Tags: postfix, smtp, java

We use Postfix to send emails from Java (Tomcat). We want to give each outgoing message a unique Return-Path header, so that our system automatically can register bounced email addresses.

For example, when I send an email to test@somewhere.com I want to use a Return-Path as 1234-ieh9fj83oiu@bounce.mydomain.com. And when I send an email to test2@somewhere-else.com I want to use a Return-Path as 1235-oijdfoijdfj33@bounce.mydomain.com.

I set the unique Return-Path header in the email in Java, before passing it on to Postfix through an SMTP connection. I have logged the outgoing message, and it has the correct (unique) "Return-Path" address.

However, when the email arrives to the recipient the Return-Path is set as support@mydomain.com. This is the email address used in From. It seems that Postfix automatically resets our custom Return-Path header with the From header.

I believe this is in line with the SMTP guidelines, when an SMTP server gateway sends an email it should reset the Return-Path header.

How can I configure Postfix so that it does NOT change the Return-Path header for my own emails?
[+][-]07/18/09 02:56 PM, ID: 24887482Accepted Solution

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About this solution

Zones: Postfix, Simple Mail Transfer Protocol (SMTP)
Tags: postfix, smtp, java
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Solution Provided By: kevin_u
Participating Experts: 1
Solution Grade: A
 
[+][-]07/19/09 03:44 AM, ID: 24888940Author Comment

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