Bounces from Yahoo

Rick Cooper rcooper at
Tue Dec 2 20:06:53 GMT 2014

This was supposedly addressed in 2009 by Jules see:
But that was exim specific, what MTA is involved here?


From: mailscanner-bounces at
[mailto:mailscanner-bounces at] On Behalf Of Jeremy
Sent: Tuesday, December 02, 2014 2:50 PM
To: MailScanner discussion
Subject: Re: Bounces from Yahoo

The reason is double subject lines. 

Jeremy McSpadden
Flux Labs | <>  | Endless
Office : 850-250-5590x501 <tel:850-250-5590;501>  | Cell : 850-890-2543 |
Fax : 850-254-2955

On Dec 2, 2014, at 1:24 PM, Kevin Miller <kevin.miller at> wrote:

Every now and then, my users will send to Yahoo and the mail bounces.  The
cause is duplicate subject headers.

SOMEONE at on 12/1/2014 3:52 PM
           Diagnostic code = NoDiagnostic; Reason code = TransferFailed;
Status code = 500
           < #5.0.0 SMTP; 554 Message not allowed -
Headers are not RFC compliant[291]>

There's a similar thread over in the Baruwa neighborhood, but apparently
it's a MailScanner bug.  They mention a fix over there but I don't know that
it's made it to github for MailScanner yet.

Anyone else having this issue?  Any patch files out for it?

Running on:
Linux 2.6.18-398.el5 #1 SMP Tue Sep 16 20:50:52 EDT
2014 x86_64 x86_64 x86_64 GNU/Linux
This is CentOS release 5.11 (Final)
This is Perl version 5.008008 (5.8.8)

This is MailScanner version 4.84.5

Kevin Miller
Network/email Administrator, CBJ MIS Dept.
155 South Seward Street
Juneau, Alaska 99801
Phone: (907) 586-0242, Fax: (907) 586-4500
Registered Linux User No: 307357 

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