Re: [SLE] Relaying.

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Date: Wed, 26 Jan 2005 02:49:15 +0100 (CET)
To: SLE <suse-linux-e@suse.com>

The Tuesday 2005-01-25 at 10:56 -0600, Danny Sauer wrote:

> > I thought so, but I also thought I had heard somewhere that more
> > complex rules could be used. You see, it can also make sense to
> > choose a different transport based on the from address, similarly to
> > what a MUA does.
>
> I think that's sort of something the MUS *should* be doing. The MTA
> is handed a message with a recipient because the MTA is supposed to be
> the "next hop" on the way to the destination.

Yes... it should. Hold on, I don't know the acronynm "MUS". Someone said
the other day how to look up those in google, but I forgot. I need a
refresher course in google ;-)

(I almost do not browse, my connected time costs money, so I minimize it)

>
> Regardless of my opinion on the matter (and how useful it would be to
> your situation), postfix can't choose a nexthop based on the sender.
> The transport lookup is only done on the recipient address. If it
> looked up the sender and the recipient, it would need a way to
> determine which of the two it should prefer in the event of multiple
> matches, and that would double the amount of time spent in the
> trivial-rewrite phase. Now, you could potentially combine some
> address rewriting filter that, given a sender address, would change
> the recipient before passing it off to postfix - taking advantage of
> the user+extension@do.main syntax...

        [I'll have to study that syntax]

Look. At this moment, I'm trying to download the kernel update. To do
this, I connect through teleline, because it has some more bandwidth than
tiscali (meaning that probably tiscali doesn't have an access router at my
local exchange, but sends the phone call forward perhaps 500 km away.
Ftp gets and average of 3-4 Kbps with them).

When I started tonight, I could send to this list. A moment ago, I can't.
Ok, I say, so say to postfix to route to suse through teleline (teleline
uses smtp with authentification). You know what happened? (English version
below):

Jan 26 02:03:21 nimrodel postfix/smtp[12505]: 4FFC020DD0:
to=<suse-linux-e@suse.com>, relay=mailhost.teleline.es[213.4.129.129],
delay=56, status=bounced (host mailhost.teleline.es[213.4.129.129] said:
550 5.7.1 ATENCION: Este mensaje no puede enviarse a este destinatario
porque esta intentando usar el servidor de correo SMTP de Terra, que solo
envia mensajes cuyo remitente sea una cuenta de c orreo Terra. Por favor,
cambie la configuracion de su programa de correo, de forma que utilice el
servidor SMTP asociado a la cuenta de correo con la cual quiere enviar el
mensaje. WARNING: This message cannot be delivered to this recipient
because the SMTP Terraserver can only process messages sent from Terra
accounts. Please set your email client program to use the SMTP server
associated to the mail account from which you intend to send the message.
(in reply to RCPT TO command))
Jan 26 02:03:28 nimrodel postfix/cleanup[12501]: 5054520DCF:
message-id=<20050126010328.5054520DCF@nimrodel.valinor>

¡&%$@*&%$&%$&%! (4 letter word) ^ 4

See? I can not use the teleline smtp server (my internet connection
provider at this instant) if my from address is from tiscali, as it is on
this list. So I can not use this relay in the transport file at all!

Do you understand the big problem? Do you understand now why I _have_ to
email directly, without relays? And also why I can not? Damm.

So, my alternative at this moment is to cut off my connection, reconnect
through tiscali, and retry hooping for the best. At least tiscali smtp
server does accept any from address, but only if my IP is one of theirs.
If you get this, it worked. :-}

> > parameters the script is fed with are:
> >
> > interface-name tty-device speed local-IP-address remote-IP-address
> > ipparam
>
> Can you switch based on the IP address? Surely their netblocks don't
> overlap, so you could just use the given IP as a determining factor as
> to which map you'd use...

If I knew all the ranges they have... remember, we are talking of a
provider serving all of Spain. The ranges is not a thing they publish. I
can dig each one, one at a time, but all of them...

-- 
Cheers,
       Carlos Robinson
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• Previous message: Chris White: "Re: [SLE] Newbe ask's where to untar files"
• In reply to: Danny Sauer: "Re: [SLE] Relaying."
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