Hi, Davide:
I had post a mail about my question about RDNS,
now I get more knowlege about it.
Mine is windows platform.
I have know now that you using 'gethostbyaddr' to
execute RDNS,which maybe return NETBIOS name, I
think that is not we hope.
Microsoft recommend using "getnameinfo".
But even for "getnameinfo",Microsoft said:
"
The capability to perform reverse lookups using the getnameinfo function is
convenient, but such lookups are considered inherently unreliable, and
should be used only as a hint.
"
Then how about RDNS? I using it to anti spam.
Best regards,
Jhon Wong
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