Mailing List Archive

Fw: Using sender_address_relay
sounds complex, how do I do this???

Thanks
Alistair



----- Original Message -----
From: "Jeffrey Wheat" <jeff@nt.cetlink.net>
To: "Alistair Knight" <alistair@nts-graphics.co.uk>; <exim-users@exim.org>
Sent: Friday, June 28, 2002 4:47 PM
Subject: RE: [Exim] Using sender_address_relay


What I did for my network is to hack courier to insert the remote IP address
for the customer when they check their email into a mysql table and have
exim check for an ip address to allow relaying...A lot like POP before relay
as done with sendmail often.

Jeff

-----Original Message-----
From: Alistair Knight [mailto:alistair@nts-graphics.co.uk]
Sent: Friday, June 28, 2002 11:41 AM
To: exim-users@exim.org
Subject: Re: [Exim] Using sender_address_relay


So what's the best way of controlling relaying, my users can log on from
anywhere, so host_accept_relay is out....

Regards
Alistair


----- Original Message -----
From: "Philip Hazel" <ph10@cus.cam.ac.uk>
To: "Alistair Knight" <alistair@nts-graphics.co.uk>
Cc: <exim-users@exim.org>
Sent: Friday, June 28, 2002 4:28 PM
Subject: Re: [Exim] Using sender_address_relay


> On Fri, 28 Jun 2002, Alistair Knight wrote:
>
> [reformatted to shorter lines]
>
> > I am currently using 'sender_address_relay' to control relaying,
>
> Not a good idea. Sender addresses are trivially forged. I wonder if
> spammers read this list and pick up admissions like that?
>
> > by creating a file called 'domains' containing a list of local
> > domains and setting local_domains = /etc/domains
>
> > Is there a way of using the same domains list file for
sender_address_relay instead of:
> >
> > sender_address_relay = *@domain1.com : *@domain2.com : etc : etc
>
> sender_address_relay = /etc/domains
>
> (Section 7.16 in the Exim 3 manual, 2nd bullet)
>
>
> --
> Philip Hazel University of Cambridge Computing Service,
> ph10@cus.cam.ac.uk Cambridge, England. Phone: +44 1223 334714.
>


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Re: Fw: Using sender_address_relay [ In reply to ]
--
On Fri, Jun 28, 2002 at 04:48:40PM +0100, Alistair Knight wrote:
| sounds complex, how do I do this???

Don't. POP-before-SMTP is a hack, at best. Use AUTH or TLS or an ssh
tunnel instead. They are designed to do what you want and are not
hackish workarounds. Setting up SMTP AUTH is quite trivial, really.

-D

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All a man's ways seem innocent to him,
but motives are weighed by the Lord.
Proverbs 16:2

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