PTR is a type of record in DNS system used for reverse DNS lookups (IP address to hostname)

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DHCP and DNS on none AD 2003 Server PTR is updating but no A records

I have a strange issue, I have a DHCP and DNS server running in a non AD environment, on Windows 2003 server. I setup DHCP to update DNS A and PTR records even if the client doesnt request it, but I ...
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How important are PTR records for Email Servers?

Does anyone know of any studies done to show how much email will be rejected if there is not ptr record for the SMTP banner name of an email server? Are reverse checks always done when enabled, or ...
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How do you know if reverse dns is setup correctly on your server

Total newb question I know, but I just want to be sure.