28 Jul
2012
28 Jul
'12
2:31 a.m.
On Sat, 28 Jul 2012, Craig Sanders <cas@taz.net.au> wrote:
that's not actually true. you can have as many PTR records as you like for a given rDNS entry.
http://en.wikipedia.org/wiki/Reverse_DNS_lookup#Multiple_pointer_records
Whether that's actually useful or not is another matter (in some cases it is, in most it is not), and it's definitely not recommended.
How many of the systems which refuse mail from servers that don't have "valid" reverse DNS would accept mail from a system with multiple reverse DNS records? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/