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I just found out that one of my coworkers had made some significant changes to this clien't WAN settings with their ISP but didn't tell me jack about it. I can't wait to never have to work with humans again! :)
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I just found out that one of my coworkers had made some significant changes to this clien't WAN settings with their ISP but didn't tell me jack about it. I can't wait to never have to work with humans again! :)

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What does this error message mean? <br />
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You do not have permission to send to this recipient. &nbsp;For assistance, contact your system administrator. <br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;mail.companywebsite.com #5.7.1 smtp;554 5.7.1 The server sending your mail [xx.xxx.xx.197] does not have a reverse DNS entry. Connection Rejected. Please contact your Dial-Up/DSL/Network ISP Provider. Default Reject!&gt;<br />
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Does it mean there is no reverse DNS entry for this company's main domain or no reverse DNS entry for something else? Also, where does the reverse DNS entry need to be created, in the sending company's DNS server(s) or someone else's DNS server? Thanks.
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What does this error message mean? 

You do not have permission to send to this recipient.  For assistance, contact your system administrator. 
            <mail.companywebsite.com #5.7.1 smtp;554 5.7.1 The server sending your mail [xx.xxx.xx.197] does not have a reverse DNS entry. Connection Rejected. Please contact your Dial-Up/DSL/Network ISP Provider. Default Reject!>

Does it mean there is no reverse DNS entry for this company's main domain or no reverse DNS entry for something else? Also, where does the reverse DNS entry need to be created, in the sending company's DNS server(s) or someone else's DNS server? Thanks.

Email rejected because no reverse DNS entry exists.

Windows 2000 is an operating system for use on both client and server computers. It is the successor to Windows NT 4.0, and is the last version of Microsoft Windows to display the "Windows NT" designation. Four editions of Windows 2000 were released (Professional, Server, Advanced Server, and Datacenter Server) that shared a core set of features, including many system utilities such as the Microsoft Management Console. All versions of the operating system support NTFS 3.0, Encrypting File System, as well as basic and dynamic disk storage. The Windows 2000 Server family includes support for Active Directory services, Distributed File System and fault-redundant storage volumes.