isp used to access smtp mailserver checked with spamhouse?

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casagrandino
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Posts: 1
Joined: Fri Mar 26, 2010 1:47 pm

isp used to access smtp mailserver checked with spamhouse?

Post by casagrandino » Sat Mar 27, 2010 11:33 am

I am traveling quite often and using ISPs in a hotel to access my mailbox and to send mail.
Mail sent to [email protected] from Panama over my smtp server in Germany are coming back with the following error:

Hi. This is the qmail-send program at server721-han.de-nserver.de.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
<[email protected]>:
80.160.76.237 failed after I sent the message.
Remote host said: 421 Message rejected
I'm not going to try again; this message has been in the queue too long.
--- Below this line is a copy of the message.
Return-Path: <[email protected]>
Received: (qmail 23966 invoked from network); 17 Feb 2010 20:10:10 +0100
Received: from ip31-128.ufinet.com.pa (HELO NB100) (64.209.31.128)
(smtp-auth username [email protected], mechanism login)
by server721-han.de-nserver.de (qpsmtpd/0.82) with ESMTPA; Wed, 17 Feb 2010 20:10:10 +0100

The IP of my smtp mail server in not listed on any blacklist. However the ISP I used at the hotel in Panama <Received: from ip31-128.ufinet.com.pa (HELO NB100) (64.209.31.128)> is blacklisted at spamhouse.
It appears that mail.dk not only checks the ip address of the mail server but also the IP adresses used to access the server.
Am I correct?
What can I do about it?

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