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 2126.96.36.199 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, 2188.8.131.52 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.