troubleshooting Question

MX-records and DNS -records in a mess?

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Wilfred2010 asked on
NetworkingEmail ServersDNS
4 Comments3 Solutions620 ViewsLast Modified:
does the external IP address given by the ISP for our company have to match the mail server's public IP or should they be separate? I have just recently inherited an IT department with the following Mx-Records.At the moment we have 3 Mx-records.Lets call them records A, B and C.Lets list in a tabular form so that it is easier to understand:

Pref                           Hostname                           IP Address                            TTL
 0                               Example1                        256.254.253.251                    24hrs
10                              Example2                       255.255.255.255                     24hrs
20                              Example3                       254.254.254.254                     24hrs

For the above records, ONLY Example1 and Example3 have a ptr record  - Example1 does not have a ptr record.Furthermore, doing a reverse dns lookup on the IP address for Example1, 256.254.253.251 shows that it is pointing to Example3 for some reason.

And Example3 has its port 25 blocked for some reason.

We are currently using an MDaemon server so is there any way I can tidy up these records because it looks to be in a mess.

Also we have have 2 domains - Domain1 and Domain2  and they both have the same MX-Records.Is this duplication?Can I just have the MX-records hosted on one server and maybe have the second domain "point" to it?Would really appreciate any help rendered.
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