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Have a look at <a href="http://forums.ntlhell.co.uk/lofiversion/index.php/t9897.html" rel="ugc">http://forums.ntlhell.co.uk/lofiversion/index.php/t9897.html</a>
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Have a look at http://forums.ntlhell.co.uk/lofiversion/index.php/t9897.html [http://forums.ntlhell.co.uk/lofiversion/index.php/t9897.html]

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&gt; your IP is in DUL<br />
<br />
The reverse DNS of your server shows that your server is &quot;in DUL&quot; - &quot;in Dial-Up Land&quot;. &nbsp;Most likely you are using a DSL connection or some other form of connection which could be construed as a home-user-access-dial-up equivalent.<br />
<br />
To get around this problem you could add another SMTP Connector which uses the address space of the rejecting domains &amp;&nbsp;forwards the e-mails to your own ISPs SMTP relay servers instead. &nbsp;Alternatively, you could send all your e-mail through your own ISP's relay servers.
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> your IP is in DUL

The reverse DNS of your server shows that your server is "in DUL" - "in Dial-Up Land".  Most likely you are using a DSL connection or some other form of connection which could be construed as a home-user-access-dial-up equivalent.

To get around this problem you could add another SMTP Connector which uses the address space of the rejecting domains & forwards the e-mails to your own ISPs SMTP relay servers instead.  Alternatively, you could send all your e-mail through your own ISP's relay servers.

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I am going through a cable modem, not sure about setting up SMTP connectors have you any instructions?
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I am going through a cable modem, not sure about setting up SMTP connectors have you any instructions?

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When I send an email to certain email address I get the following error message in &nbsp;a reply message...<br />
<br />
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.<br />
&nbsp; &lt;Server #5.5.0 smtp;553-mail rejected because your IP is in DUL. See&gt;<br />
<br />
What is the problem here?<br />
<br />

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When I send an email to certain email address I get the following error message in  a reply message...

There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
  <Server #5.5.0 smtp;553-mail rejected because your IP is in DUL. See>

What is the problem here?



Error message when send email

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