SMTP Communication Problems

[dtmr]

My message isn't reaching its intended recipient.

The message I get is:

There was a SMTP communication problem with the recipient's email server.
Please contact your system administrator.
<doman #5.5.0 smtp;553-mail rejected because your IP is in DUL. See>

 

[Brian Tillman]

My message isn't reaching its intended recipient.

The message I get is:

There was a SMTP communication problem with the recipient's email
server. Please contact your system administrator.
<doman #5.5.0 smtp;553-mail rejected because your IP is in DUL. See>

"DUL" (dial-up list) is a dial-up black list. ISPs have their address
spaces segmented into various parts, including a group (or groups) of
addresses strictly used for dial-up. These addresses should never be
sending mail directly to servers other than their own ISP's mail servers,
which will forward the messages. Other mail servers reject mail sent from
any dial-up addresses because more likely than not, it's a SPAM attempt.

 

[dtmr]

Thank you Brian, at least I understand what is going on, but not how to sort
the problem out. Any suggestions?

 

[Brian Tillman]

Thank you Brian, at least I understand what is going on, but not how
to sort the problem out. Any suggestions?

Other than explaining the situation to your ISP and contacting MAPS, no.
http://www.mail-abuse.com/ (which should lead you to
http://www.kelkea.com/).