srf@claudius.juliet.ll.mit.edu ( Steve Feinstein) (04/05/91)
Is it possible to send mail using numerical addresses instead of domain names? Our yp hosts database is far from complete and rather than constantly asking our sys admin to add names to it, I'd like to be able to send mail based on the numerical address. I tried aliasing some names but it didn't work. The mailer-daemon still complained that the host was unknown. Is there a way to do this? Thanks in advance for all responses. -- Steve Feinstein +-------------------------------------------------------------------------+ | INTERNET: srf@juliet.ll.mit.edu | | USmail: S. Feinstein, MIT Lincoln Lab, 29 Hartwell Ave., | | Lexington, MA 02173 USA | | VOICE: (617) 981-4017 | +-------------------------------------------------------------------------+
simon@opal.CS.TU-Berlin.DE (Simon Leinen) (04/09/91)
>>>>> On 5 Apr 91 14:56:53 GMT, srf@claudius.juliet.ll.mit.edu ( Steve >>>>> Feinstein) said: Steve> Is it possible to send mail using numerical addresses instead Steve> of domain names? From RFC 821 (Simple Mail Transfer Protocol): ... One form is a decimal integer prefixed by a pound sign, "#", which indicates the number is the address of the host. Another form is four small decimal integers separated by dots and enclosed by brackets, e.g., "[123.255.37.2]", which indicates a 32-bit ARPA Internet Address in four 8-bit fields. So you can probably use addresses of the form simon@[192.35.149.176] (works for me). Steve> Our yp hosts database is far from complete and rather than Steve> constantly asking our sys admin to add names to it, I'd like to Steve> be able to send mail based on the numerical address. The correct solution to your problems would be to use the Domain Name System. This is something like a huge distributed database that transparently maps (among other things) qualified hostnames to IP-addresses by querying different name servers on the Internet. -- Simon. Internet: simon@[192.35.149.176] simon@Opal.CS.TU-Berlin.DE