Re: [Exim] Trying to implement user+extension@domain in enve…

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Autor: Philip Hazel
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A: hmh+eximml
CC: exim-users
Assumpte: Re: [Exim] Trying to implement user+extension@domain in envelope from
On Mon, 15 Nov 1999 hmh+eximml@??? wrote:

> 1. I need exim to accept mail from _untrusted_ users using From:
>    user+whatever@domain, as it is a perfectly valid source address now and I
>    can't have exim adding Sender: user@domain headers. Also, I need this to
>    work from both smtp and local (delivered through the "sendmail" command
>    implemented by exim) sources.

>
>    I couldn't find a way to do this, and the FAQ didn't help much :-(


I don't think this question has been raised before. We do not make use
of this facility, so I have no experience of it, but I suspect that
those who do normally put the "special" address in Reply-To rather than
in From. Or maybe they tolerate the addition of Sender. After all, RFC
822 says:

     4.4.1.  FROM / RESENT-FROM                                       


        This field contains the identity of the person(s)  who  wished
        this  message to be sent....


     4.4.2.  SENDER / RESENT-SENDER                                


        This field contains the authenticated identity  of  the  AGENT
        (person,  system  or  process)  that sends the message....


     4.4.3.  REPLY-TO / RESENT-REPLY-TO                               


        This field provides a general  mechanism  for  indicating  any
        mailbox(es)  to which responses are to be sent.... 


> 2. I need the _envelope_ sender to be properly set to user+whatever for
>    outgoing mail from user+whatever@domain. And I need this to work from
>    smtp and local ("sendmail" command) sources.


> Is there another way to do this without ressorting to filtering the mail
> through an external script ? I apologise if this is a FAQ, but I couldn't
> find a working answer there...


I don't think there is at the moment. I will think about it, but I'm
afraid not immediately.


-- 
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.