Re: SMTP-Error 451 while using smarthost for mail delivery
On Thu, 22 Apr 2010 16:20:01 +0200, b1 wrote:
> Currently I am trying to set up a Debian Lenny Server, but I am stuck at
> mail delivery. The server I am trying to set up, has no FQDN, so I used
> my ISP-Mailserver as a smarthost (I enabled the proper SMTP
> authentication in exim4).
> This setup worked a few days, before I suddenly received 451 errors. At
> first I thought it to be a problem with Exim4, so I switched to postfix.
> But postfix also gives me the 451 error:
>
> Apr 22 15:53:31 openshoolproxy postfix/smtp[24368]: 413CF26EF9:
> to=<webservice@b1online.de>, orig_to=<root@openshoolproxy>,
> relay=smtp.strato.com[81.169.145.132]:25, delay=2137,
> delays=2136/0.05/0.33/0.12, dsn=4.0.0, status=deferred (host
> smtp.strato.com[81.169.145.132] said: 451 Local Error (in reply to end
> of DATA command))
Mmm, the remote server (81.169.145.132) has encountered some kind of
error while sending "data" command.
But, are you in control of Strato's server? If no, then you can only
contact them and request more info about this error. If the problem is on
their side, you can only "guess".
(...)
> telnet smtp.strato.de 25
> Trying 81.169.145.133...
> Connected to smtp.strato.de.
> Escape character is '^]'.
> 220 smtp.passthru
^^^^^^^^^^^^^
(...)
> 451 Local Error
Look that "smtp.passthru" string, it seems some kind of proxy/redirector
service.
> Very odd. After this fail I tried the same procedure from my arch linux
> box at home. It succeeded:
>
>
>
>
> telnet smtp.strato.com 25
> Trying 81.169.145.132...
> Connected to smtp.strato.com.
> Escape character is '^]'.
> 220 post.strato.de [fruni mo3] ESMTP RZmta 23.0 ready; Thu, 22 Apr 2010
> 15:55:55 +0200 (MEST)
(...)
> 250 queued as g0718am3MD7AJw
That server response looks more "normal". No proxy between you and smtp
server.
(...)
If available, try to send an e-mail using a secure channel (SSL/TLS
465/587 port) and check if that works. The idea behind this is to bypass
the proxy server on their side altough I'm not sure this will work :-/
Greetings,
--
Camaleón
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