Outgoing E-mails Problem

  • From: "Mohammed Naimathullah Siddiqui" <mailnaimathullah@xxxxxxxxx>
  • To: <exchangelist@xxxxxxxxxxxxx>
  • Date: Wed, 5 Oct 2005 13:53:29 +0300



I hope all are fine, we have exchange 2003 DC and also exchange 2003 server
and we are using GFI mail essential for downloading e-mails form our hosting
company. We have configured two domain names in it xyz.com and abc.com it
was working fine 2 months, but now we are facing the problem in sending
e-mail when we send any e-mail to hotmail,yahoo and gmail it is going but
others it is not going. After staying in the SMTP queue e-mails are
returning back with this message.


Your message did not reach some or all of the intended recipients.


      Subject:             FW: API-570 Marks

      Sent:                 10/3/2005 12:29 PM


The following recipient(s) could not be reached:


      '123@xxxxxxxxxx' on 10/3/2005 12:29 PM

            There was a SMTP communication problem with the recipient's
email server.  Please contact your system administrator.

            <exchange.Al-Subeaei.com #5.5.0 smtp;550 Denied by policy:
Sender is listed on DNS-based RBL.>


Can help me in this problem because now every e-mail is returning with this






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