Re: Inserting a unique ID into the email header with Postfix alone

[Istvan Prosinger]

On 19.3.2016 15:13, Wietse Venema wrote:
Istvan Prosinger:
[ Charset windows-1252 converted... ]
On 19.3.2016 1:18, Wietse Venema wrote:
Istvan Prosinger:
Why a separate header, why not just:

enable_long_queue_ids = yes

and use the queue ID that's already in your top Received: header?

I would use a header_checks PREPEND action that prepends a header
with the long queue ID from the Received: header.

Sorry, no time to write out a complete example.

Thanks.

Ok, I was thinking of this, but wasn't sure how to "pass" the (long or
not) queue ID (or anything else) in header_checks. Another thought is to
copy one that is already there, but not sure how to do it or how far can
I go in a "one-liner"

/etc/postfix/main.cf:
      enable_long_queue_ids = yes
      header_checks = /etc/postfix/stamp.pcre

/etc/postfix/stamp.pcre:
      # Pattern for /usr/sbin/sendmail submission
      /^Received:\sby\sserver\.example\.com\s\S+\s\S+\s\S+\s+id\s(\S+);/ 
Prepend X-ID $1.server.example.com

      # Pattern for SMTP submission
      
/^Received:\sfrom\s\S+\.example\.com\s\S+\s\S+\s+by\sserver\.example\.com\s\S+\s\S+\s\S+\s+id\s(\S+);/
 Prepend X-ID $1.server.example.com

        Wietse



Thanks for the ideas. I need to mark the incomming mails for local
storage tracking, not submission, so anyway, I ended up with a shorter
version

/name\.server\.com\s\S+\s\S+\s\S+\s+id\s(\S+)/ Prepend X-DIYL-$1

I recommend starting the pattern with /^Received:.*by name\.server\.com.../
That way it won't have to inspect non-"Received:" headers.

And added to
smtpd_recipient_restrictions =  check_recipient_access
pcre:/etc/postfix/stamp.pcre

I'm quite sure that I have a match on the queue id, but the Prepend has
no effect on the header. What am I missing?

Test with:

     postmap -h pcre:/etc/postfix/stamp.pcre < file

where the file contains an email message with Received: headers.

        Wietse

        Wietse


Thanks,

I'll make the pattern search detailed as you suggested.

I've tried what you ask, this is what I got:

[root@email ~]# postmap -h -q - pcre:/etc/postfix/stamp.pcre < testheader

Received: from localhost (localhost [127.0.0.1])
        by email-test.server.com (Postfix) with ESMTP id 3qRyhf4pqCzKmYs
        for <ist...@email-test.server.com>; Sat, 19 Mar 2016 06:17:54 
-0400 (EDT) Prepend X-DIYL-3qRyhf4pqCzKmYs
Received: from knox.prosinger.net (knox.prosinger.net [5.44.101.107])
        by email-test.server.com (Postfix) with ESMTPS id 3qRyhf0ChgzKmYq
        for <ist...@email-test.server.com>; Sat, 19 Mar 2016 06:17:52 
-0400 (EDT) Prepend X-DIYL-3qRyhf0ChgzKmYq


I think that this means two hits. If so, what comes to my mind is that 
these headers are not there yet, in the moment when the stamper.pcre is 
called.