question regarding recommended PTR record configuration with multiple mail sites hosted on same IP
acroft at cyber-wizard.com
Thu Feb 9 08:17:04 UTC 2006
I appologise if I waste anyone's time-I just wish to be clear on something.
I often see mentioned that there should be a PTR record set up for a
mail server, but what is the recommendation in a case where multiple
sites share a mail server? In other words, there exists something like
(I can provide actual hostnames/IPs, if needed):
host.domain00.com. IN A 18.104.22.168
mail.domain01.com. IN A 22.214.171.124
mail.domain02.com. IN A 126.96.36.199
mail.domain03.com. IN A 188.8.131.52
Should there be a PTR record for each name entry? Or just one, and if
so, what should it refer to? I seem to recall seeing mention in an older
copy of _DNS_and_Bind_ of some systems not behaving properly when seeing
multiple PTR records-is this still the norm?
Thank you in advance for your time and consideration.
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