Re: [exim] exim attachment handling

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Author: Nigel Metheringham
Date:  
To: paul spandler
CC: exim users
Subject: Re: [exim] exim attachment handling

On 29 Oct 2008, at 15:06, paul spandler wrote:

> 2008/10/29 W B Hacker <wbh@???>:
>> Exim is doing precisely what an(y) MTA is supposed to do - NOT
>> whimsically altering the headers, message or attachment content, or
>> encoding of valid smtp message traffic.
>
> This is exactly the sort of response I had hoped to receive. The
> vendor's suggestion seemed contrary to my understanding of what any
> MTA would do (irrespective of the flavour.)


I suspect that although exim is not modifying your message, it is
causing the original sender to modify the message.

And this probably down to 8bit mime.

I suspect you are, like most people, using exim without the
accept_8bitmime option being set

http://docs.exim.org/current/spec_html/ch14.html

The sending host is seeing no 8bit mime being offered, and so is
mangling the message to make it 7 bit clean. I presume if the host
sends directly to your other box, that is offering 8bit mime and so
the mangling is avoided.

It may be possible for you to set accept_8bitmime (exim is 8 bit
clean), but if you are sending to other sites that cannot accept 8bit
mime, then exim won't convert those messages, which may result in
problems.

    Nigel.
--
[ Nigel Metheringham             Nigel.Metheringham@??? ]
[ - Comments in this message are my own and not ITO opinion/policy - ]