Errors sending email through RT: Duplicate header field

[Stephen Switzer]

Cross-posted from rt-users. I don't know which software package is to
blame... 

Hello! 

   I'm using Request Tracker 4.4.1 sitting behind Kolab 16 as a mail
server. This includes amavisd-new as a filter, and this combination
causes bounces to RT occasionally... and my customers aren't getting my
replies! 

   If I send an email to an RT ticket, which I am the owner of, RT sends
an email on my behalf to the requestor (as it should). Unfortunately,
amavisd-new sometimes sees 2 "Sender" headers and rejects the email
which creates a new ticket in RT with the bounce reason. Here' the
header-1.hdr attachment that amavis replies with:

> Return-Path: <support at example.com>
> Sender: steve at example.com
> MIME-Version: 1.0
> Content-Type: multipart/alternative;
> boundary="=_b308d10660951d296cc57d268c770c5f"
> Sender: Stephen Switzer <steve at example.com>
> Date: Mon, 19 Dec 2016 23:55:55 -0500
> From: "RT, Support" <support at example.com>
> To: support at example.com
> Subject: Re: [SBS #99845] Laptop will not connect to the internet
> In-Reply-To: <rt-4.4.1-1416-1482202966-319.99845-8-0 at example.com>
> References: <RT-Ticket-99845 at example.com>
> <CY4PR10MB16247C062AD6E90C674E7AE1B4900 at CY4PR10MB1624.namprd10.prod.outlook.com>
> <rt-4.4.1-1416-1482202966-319.99845-8-0 at example.com>
> Message-ID: <a1cd0f3d6b0cc448f7d4dd737df29a80 at example.com>
> X-Sender: support at example.com

Yes, I sanitized, even though you can deduce what it really was
easily... :) 

I grep'd the RT code, and found that lib/RT/Interface/Email.pm seems to
be what is responsible... but no obvious line that tells me this code is
used for OUTBOUND email. Can anyone shed some light on this issue? I'd
be happy to hack code, I just want it fixed. 

Thank you!
-- 
Best regards,
Steve 

Stephen H. Switzer 
President & Chief Technical Consultant 

steve at SBSroc.com 

MAIN:
CELL: 
+1 (585) 298-9420   EXT: 7001
+1 (585) 202-8312 

Support Desk:
support at sbsroc.com 

FAX: 
+1 (585) 625-0020 

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Links:
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