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IP Resolve Error
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Sender IP Must Resolve
The email server that sent the original message to us does not have DNS setup correctly
for it. The error "Sender IP must resolve" means that
they have no reverse lookup for the IP address of their outgoing
email server. Our secure email server requires that MX records for the sending domain, and
reverse DNS for the sending IP address be properly configured.
Internet Standards have required this for email servers since 1990.
The
domain administrator for that system must add a PTR record for the IP
address of
their outgoing email server pointing to the machine that is their
outgoing email server.
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example we will assume that the IP address of your mailserver is
175.165.208.21 and you are using Microsoft DNS on NT 4.0 Server.
Click the thumbnails on the right to see full size
screen shots.
From DNS manager (if you're not sure where that is then Click
- Start -> Programs -> Administrative Tools -> DNS Manager)
right click on your primary 208.165.175.in-addr.arpa zone, pick New
Record from the popup menu ...
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Once the New Record dialogue
box appears, click PTR in the Record Type area, click in the IP
Address box and type in your IP address 175.165.208.21, click in the
Host DNS Name box and type the fully qualified domain name of your
mailserver - myserver.mydomain.com - then click OK.
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| Once you have added the PTR
record we should be able to receive your email, although it could
take a while for this change to propagate if the information is
cached. |
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