Exchange email problem
Hi, one of our clients is unable to send us emails, he can receive the mails we send him, but when he replies, it comes back with the below error. Could anyone possibly tell me what and where the problem is?
Delivery has failed to these recipients or distribution lists:
'grantm@profileglass.co.za'
Your message wasn't delivered because of security policies. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator.
The following organization rejected your message: isp.org.za.
_____
Sent by Microsoft Exchange Server 2007
Diagnostic information for administrators:
Generating server: virgo.aquariusum.co.za
grantm@profileglass.co.za
isp.org.za #550 5.7.1 <grantm@profileglass.co.za>... Fix reverse DNS for 41.223.61.90,or use your ISP server ##
Original message headers:
Received: from virgo.aquariusum.co.za ([41.223.61.90]) by
virgo.aquariusum.co.za ([41.223.61.90]) with mapi; Wed, 20 Aug 2008 11:07:56
+0200
From: "profileglass@worldonline.co.za" <profileglass@worldonline.co.za>
To: "'grantm@profileglass.co.za'" <grantm@profileglass.co.za>
Sender: Andrew Packman <andrewp@aquariusum.co.za>
Date: Wed, 20 Aug 2008 11:07:54 +0200
Subject: Accepted: Golf
Thread-Topic: Golf
Thread-Index: AckCCHhWbekQpL5dQDKBjseyFRuO7gAADAgwACbN0FA=
Message-ID: <D3349AA055E5EE4EBFBBA2CD23BFAB53010ED6CDE21F@virgo.aquariusum.co.za>
Accept-Language: en-US, en-ZA
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
acceptlanguage: en-US, en-ZA
Content-Type: multipart/alternative;
boundary="_002_D3349AA055E5EE4EBFBBA2CD23BFAB53010ED6CDE21Fvirgoaquari_"
MIME-Version: 1.0
Software/Hardware used:
Software/Hardware used:
ASKED:
August 25, 2008 10:04 AM
UPDATED:
August 25, 2008 12:24 PM
Answer Wiki:
Sounds like your receiving connector is setup to do reverse DNS lookups. The text "<b>Fix reverse DNS for 41.223.61.90,or use your ISP server ##</b>" is the indicator of this. Not all organizations have setup reverse DNS and some e-mail systems do this to reduce spamming but as you see, it can also stop legitimate e-mails. To learn more about reverse DNS see this <a href="http://en.wikipedia.org/wiki/Reverse_DNS_lookup#Reverse_DNS_requirement">Wikipedia entry</a>. To fix it take a look at these suggestions:
<a href="http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=2168540&SiteID=17">Technet forum posting</a>
<a href="http://searchexchange.techtarget.com/generic/0,295582,sid43_gci1243413,00.html">DNS & Exchange</a>
<a href="http://support.microsoft.com/kb/297412/">Microsoft KB 297412</a>
To see all answers submitted to the Answer Wiki: View Answer History.
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