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[Reference:<_A3408@delegate-en.ML_>]
Newsgroups: mail-lists.delegate-en

[DeleGate-En] Re: delegate smtp error reply - smtp server rewrite
22 Jul 2006 07:17:03 GMT Martin Papadopoulos <payeabdyi-hugik5xrznxr.ml@ml.delegate.org>


Yutaka Sato schrieb:
> Hi,
>
> In message <_A3405@delegate-en.ML_> on 07/21/06(20:06:23)
> you Martin Papadopoulos <payeabdyi-hugik5xrznxr.ml@ml.delegate.org> wrote:
>  |i have 2 questions regarding delegate as an smtp proxy
>  |
>  |1. how can i respond with a message to a denied smtp client
>  |    e.g. delegate works as smtprelay with a reject list
>
> You can reject SMTP clients based on the IP-address or the hostname of
> the client as in other protocols, or based on the E-mail address or other
> contents of the message using "SMTPGATE" configuration.
>
> The response for the rejection to the client is just an error code
> with a short message in SMTP protocol.  DeleGate does not generate
> "error return message" which can be utilized for some attacks.
>
>  |2. is it possible to rewrite the original smtp servername whe delegate
>  |acts as smtp proxy ?
>
> Sorry but what does the "original smtp servername" mean?
>
> Cheers,
> Yutaka
> --
>   9 9   Yutaka Sato <y.sato@delegate.org> http://delegate.org/y.sato/
>  ( ~ )  National Institute of Advanced Industrial Science and Technology
> _<   >_ 1-1-4 Umezono, Tsukuba, Ibaraki, 305-8568 Japan
> Do the more with the less -- B. Fuller
>
>   
2. when delegate is involved as an smtp proxy
    >>    delegated -P25 SERVER=smtp://localmailserver:9925
the replied servername from localmailservers appears in the smtp session
    >>   220 <1153552313.2761055136@fqdn..> [XMail 1.22 ESMTP Server]
service ready; Sat, 22 Jul 2006 09:11:53 +0200
, which is perfectly normal. is it possible to rewrite the fqdn.name for
the connecting end ?

greetz

martin papadopoulos



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