Re: [exim] Changing Email Identity

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Author: gascione
Date:  
To: exim-users
Subject: Re: [exim] Changing Email Identity



W B Hacker wrote:
>
> Magnus Holmgren wrote:
>
>> On Wednesday 11 October 2006 20:28, Magnus Holmgren took the opportunity
>> to
>> say:
>>
>>>On Wednesday 11 October 2006 19:59, gascione took the opportunity to say:
>>>
>>>>We use exim4 servers as front end antivirus, spam checking,
>>>>sender/receiver, stuff like that before the mail is passed off to our
>>>>commercial email application. If a valid message is delivered the

headers
>>>>screw up some functionality on the mail server side because the last hop
>>>>of the mail is our gateways which is always valid and therefore messes

up
>>>>the SPAM and filtering system on the mail server side.
>>>
>>>What systems are those? If they're decent (like SpamAssassin), it should

be
>>>possible to configure them to interpret the headers correctly.
>>>
>>>
>>>>Is there a way to get exim to deliver the message to the mail server as
>>>>if it was the original delivering mail server so the original header
>>>>information remains at the top of the header when it reaches our mail
>>>>server. Iin other words, can exim act like the original sending mail
>>>>server when it passes the message along to our internal mail server.
>>>
>>>If you must, set received_header_text to nothing.
>>
>>
>> Wait a minute ... That won't help. If your commercial mail application
>> looks
>> at the headers at all, and get it wrong, it's the line added by the
>> internal
>> server you have to get rid of.
>>
>> If that's not possible, then I think you have to start messing on the
>> TCP/IP
>> level and make it look like the connection from the Exim server actually
>> comes from the remote host. It's theoretically possible, but ...
>>
>>
>
> Might this serve just as well - and with less risk:
>
> 1) AFAIK, Exim has, or *can extract* the information that was in the
> 'Received:'
> header just prior to the one it normally adds.
>
> 2) "Received:" headers are ordinarily 'stacked' - latest on top.
>
> 3) IF THEN Exim is told to save, then construct and add-back an extra
> 'Received:' header that is basically a duplicate of what it had
> on-arrival, that
> header can be at the top of the stack.
>
> Will that 'satisfy' the next level of servers w/o losing the 'real'
> traceback info?
>
> ... and, if so, might that be better than stripping headers?
>
> Bill
>
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>
>


That sounds like it will do the trick. I am really not looking to get rid of
the header information just reorder it.


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