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We just switched over to Verizon as our DSL carrier and are starting to have some odd issues. &nbsp;I am sure it has something to do with the DNS settings an reverse lookups for the remote mail server in that ours is registering with the internal name (netbios_name.domain.com) and the IP address is registering as the big long nasty thing from Verizon (see below) and the two are not matching. &nbsp;Have you seen this and do you have any suggestions?<br />
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&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;netbios_name.domain.com #5.7.1 smtp;554 5.7.1 &lt;verizon static IP&gt;: Client host rejected: Please use your ISPs Mail Servers. &nbsp;Goodbye. CLIENT&gt;<br />
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Do I just need to add the mail.domain.com to the smtp virtual server setting? &nbsp;(Exchange 2003, spt2)
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We just switched over to Verizon as our DSL carrier and are starting to have some odd issues.  I am sure it has something to do with the DNS settings an reverse lookups for the remote mail server in that ours is registering with the internal name (netbios_name.domain.com) and the IP address is registering as the big long nasty thing from Verizon (see below) and the two are not matching.  Have you seen this and do you have any suggestions?

You do not have permission to send to this recipient.  For assistance, contact your system administrator.
            <netbios_name.domain.com #5.7.1 smtp;554 5.7.1 <verizon static IP>: Client host rejected: Please use your ISPs Mail Servers.  Goodbye. CLIENT>

Do I just need to add the mail.domain.com to the smtp virtual server setting?  (Exchange 2003, spt2)

Email problems, reverse lookup?

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.