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Old 03-15-2017, 12:17 PM   #1
LQ Newbie
Registered: Aug 2007
Location: Newcastle UK
Distribution: Arch, Gentoo, Xubuntu
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Mail Rejections (Exim / Mutt)


When I try to send emails in Mutt they normally work fine, including 'bouncing' emails onto another address - however when the encoding is 7bit, I can neither bounce nor attach to a new email. [Edit - apparently some 7bit emails can be forwarded, this was a red herring: see attached image for a screenshot of encodings]

The failure message (forwarded as attachment) is:

Date: Wed, 15 Mar 2017 16:32:16 +0000
From: Mail Delivery System <>
To: me
Subject: Mail delivery failed: returning message to sender

[-- Attachment #1 --]
[-- Type: text/plain, Encoding: 7bit, Size: 0.2K --]

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

[-- Attachment #2 --]
[-- Type: message/delivery-status, Encoding: 7bit, Size: 0.1K --]

Reporting-MTA: dns;

Action: failed
Final-Recipient: rfc822;
Status: 5.0.0

[-- Attachment #3 --]
[-- Type: text/rfc822-headers, Encoding: 7bit, Size: 2.1K --]
<forwarded email headers>
Now, I am a bit confused, as this affects more than 1 receiving server (tested with Yahoo!, my work email and

There is another guy on the internets had this problem, but the question was abandoned before anything meaty was discovered:

The mail server log shows:

2017-03-15 17:03:55 1coCL5-0005kW-Ql <= me U=myuser P=local S=33269 id=20170315170355.GD4978@yyyyyy.localdomain
2017-03-15 17:03:56 1coCL5-0005kW-Ql ** R=dnslookup T=remote_smtp: message is too big (transport limit = 1)
2017-03-15 17:03:56 1coCL6-0005kb-3v <= <> R=1coCL5-0005kW-Ql U=exim P=local S=1825
2017-03-15 17:03:56 1coCL5-0005kW-Ql Completed
The message isn't too big - the error message apparently means there are long long lines in the email:

So, in really simple terms, can someone tell me what looks like the problem is and has anyone seen a bug report for Arch or Exim or Perl that I can CC myself onto, or a patch or similar I can do to make this work

Attached Thumbnails
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Name:	7bit Mutt.png
Views:	36
Size:	11.7 KB
ID:	24521  

Last edited by flangemonkey; 03-16-2017 at 06:41 AM. Reason: Updated with more information
Old 03-16-2017, 06:51 PM   #2
Registered: Apr 2016
Posts: 510

Rep: Reputation: 58
exim is an extremely large and complex email + "code activation" system

if there is a problem with your setup it can even allow remote persons on the internet to root your computer by sending specially crafted emails to exim

my answer would be: use something far simpler, something that installs and "just works"

why are you working with intentionally re-bouncing bounced email ? your not making a spam mailer are you ? those are illegal in the USA
Old 03-17-2017, 04:10 AM   #3
LQ Newbie
Registered: Aug 2007
Location: Newcastle UK
Distribution: Arch, Gentoo, Xubuntu
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Mutt is a CLI client, so if I see an HTML email I feel inclined to see, I bounce it on to another of my addresses, perfectly legally - and I'm not even in the US...

And as far as I can see the Exim package is correctly configured, but if someone would like to see my config, I'm sure I can put it up here. Personally I believe the problem lies somewhere in Perl or Mutt, rather than Exim.


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