When you ping an IP address, you are not doing a reverse DNS, you are simply accessing the ip address. No DNS is involved, simply routers. Reverse DNS is used by mail servers to validate that an email message comes from the host it purports to be. (eg. anti-SPAM).
On 8 Feb 2002 at 10:17, Michael O'Donnell wrote: > > > I can resolve and reach that hostname from within the > AT&T network with no trouble: > > > > ######## shrapnel:~/.mail/inbox 966---> host diffloth.com > > diffloth.com A 199.232.38.4 > > ######## shrapnel:~/.mail/inbox 967---> ping 199.232.38.4 > > PING 199.232.38.4 (199.232.38.4): 56 data bytes > > 64 bytes from 199.232.38.4: icmp_seq=0 ttl=238 time=71.8 ms > > 64 bytes from 199.232.38.4: icmp_seq=1 ttl=238 time=70.1 ms > > > > --- 199.232.38.4 ping statistics --- > > 2 packets transmitted, 2 packets received, 0% packet loss > > round-trip min/avg/max = 70.1/70.9/71.8 ms > > > ...but it's possible that AT&T's SMTP server can't so so. > > > > ***************************************************************** > To unsubscribe from this list, send mail to [EMAIL PROTECTED] > with the text 'unsubscribe gnhlug' in the message body. > ***************************************************************** -- Jerry Feldman Portfolio Partner Engineering 508-467-4315 http://www.testdrive.compaq.com/linux/ Compaq Computer Corp. 200 Forest Street MRO1-3/F1 Marlboro, Ma. 01752 ***************************************************************** To unsubscribe from this list, send mail to [EMAIL PROTECTED] with the text 'unsubscribe gnhlug' in the message body. *****************************************************************
