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602LAN SUITE 2004 User Forumforum home | rss | search | terms of use
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IP address is in DUL
  Posted by  Gary Seymour  on Monday, November 15, 2004 at 3:44:46 PM (EST)
I get the following message when I e-mail a particular person

'mail38.messagelabs.com': 553-mail rejected because your IP is in DUL.

What does it mean and how can i stop it ?
  Posted by It Manager  on Tuesday, November 16, 2004 at 12:01:45 AM (EST)
Gary,

Messagelabs is a "anti-spam" co. The person who you are sending mail to, is most probably using their "black lists" to test for spam messages, and your IP address (or the range of IP addresses from your ISP) is on that list. It might be because:

* Your IP address were listed as a spam originator (hopefully not...)
* Your mail server is an open relay
* Someone else was assigned this specific IP (if you are using ISDN or analogue or ADSL)and was spamming, resulting in the IP being blacklisted.

As for getting off their list? Not always that easy. But you can try www.messagelabs.com for info

Hope this helps,

Eugene
  Posted by Robert Smith  on Tuesday, November 16, 2004 at 10:56:45 AM (EST)
DUL=Dial Up List. It's an anti-spam measure. It doesn't mean you're using dialup, but you are using a residental service or a "dynamic" IP range that is blocked.

To solve this, send the mail through the ISP's smtp server. That can be configured from the SMTP tab in the Advanced Configuration.
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