On Fri, 30 Nov 2001 swhite@??? wrote:
> On 30 Nov 2001, at 16:51, Sergey Matveychuk wrote:
>
> > I see no troubles to do it. Just direct all SMTP traffic to server you want.
> > Needness of special HTTP transparent proxy explains by need to save
> > destination IP address of connection. For SMTP destination IP is not
> > important.
>
> Not quite - transparency is needed if an SMTP server on a host
> with IP address of, say, 10.1.1.1 is to intercept a SMTP session
> destined for, say, 123.234.45.6 (**gross.oversimplification.alert**)
Er, actually, you dont need a mailserver - all you need is NAT/IP
masquerading...
>
> > Really it is a bad idea. You have to now all your mailservers if you are a
> > system administrator of your company. If you aren't, I guess your company is
> > bad organized and everyone acts as he wants.
>
> I wish it were that simple. This isn't a single company but rather
> many organisations making use of a common Intranet and a
> common connection to the Internet. Each organisation has its own
> IT department with various servers, including mailservers, and all of
> these are run by each organisation seperately. There is no overall
> controlling body. Placing relays at strategic points in the network
> and requiring the mailservers to forward their mail to the relays
> (smart hosts) has been tried and has worked but bottlenecks have
> crept in and we can't keep on upgrading equipment or lines.
>
> In the interests of efficiency and speed of mail deliveries, allowing
> direct deliveries based on the DNS entries between the users of the
> Intranet is necessary but deliveries to the larger Internet must be
> relayed. Transparent operation or a multiple DNS hierarchy with
> fake root nameservers are the only solutions I can think of and the
> thought of fake root nameservers gives me the willies.
>
> Still, if it can't be done then then I'll either have to do the DNS stuff
> or try and get some co-operation and agreement from the various
> hundreds of mailhost admins. Herding cats would be easier.
>
>
> Regards,
>
> - Sean.
>
> --
>
> ## List details at http://www.exim.org/mailman/listinfo/exim-users Exim details at http://www.exim.org/ ##
>
>
--
