Exchange 2003 issue. Email bounces back when trying to send an email
Hello,
we are trying t send an email to domain abc.com but the email bounces back.
Their IT dept sent us the following reply. What exactly do we need to do ?
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...Their mail server is failing our DNS verification test. Their outbound mail server is 64.83.85.10. That address maps back to the name llshost8510.domain.com, but that name is not in the DNS. They need to fix their DNS.
Here is an excerpt from a web page still under construction which explains the problem in more detail. The text is still rough, but it gets the point across.
Our servers perform a simple DNS verification on the IP address of
each inbound SMTP connection. A reverse lookup is performed on the
address to get its name, and that name is then looked up to get an
address. If the two addresses don't match, or if either of the DNS
queries fails, then this is considered a suspicious condition and the
sending host is allowed to send us only one recipient per hour.
In general, we do not grant exceptions to this rule. A DNS
verification failure almost always indicates an error in your DNS
configuration, which needs to be fixed. If you can demonstrate that
your DNS is correct and that some other factor is leading to a false
positive under this rule then we can exempt your server.
we are trying t send an email to domain abc.com but the email bounces back.
Their IT dept sent us the following reply. What exactly do we need to do ?
--------------------------
...Their mail server is failing our DNS verification test. Their outbound mail server is 64.83.85.10. That address maps back to the name llshost8510.domain.com, but that name is not in the DNS. They need to fix their DNS.
Here is an excerpt from a web page still under construction which explains the problem in more detail. The text is still rough, but it gets the point across.
Our servers perform a simple DNS verification on the IP address of
each inbound SMTP connection. A reverse lookup is performed on the
address to get its name, and that name is then looked up to get an
address. If the two addresses don't match, or if either of the DNS
queries fails, then this is considered a suspicious condition and the
sending host is allowed to send us only one recipient per hour.
In general, we do not grant exceptions to this rule. A DNS
verification failure almost always indicates an error in your DNS
configuration, which needs to be fixed. If you can demonstrate that
your DNS is correct and that some other factor is leading to a false
positive under this rule then we can exempt your server.
SOLUTION
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Point to return.
ASKER
On the external DNS my MX record doesnt have PTR.
On the internal DNS i think it does.
So..do i need PTR (Reverse in Linux) on both external and Internal DNS ??
Thanks both of you in advance.
Nick.
On the internal DNS i think it does.
So..do i need PTR (Reverse in Linux) on both external and Internal DNS ??
Thanks both of you in advance.
Nick.
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