Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!udel!haven!decuac!pa.dec.com!decwrl!brister From: brister@decwrl.dec.com (James Brister) Newsgroups: comp.unix.internals Subject: Re: sendmail Message-ID: Date: 22 Mar 91 00:12:46 GMT References: Sender: news@pa.dec.com (News) Organization: DEC Western Software Lab Lines: 47 In-Reply-To: howcome@media-lab.media.mit.edu's message of 21 Mar 91 18:37:01 GMT X-Checksum-Snefru: fdecc3d4 52a572d7 c2035fdc 3d442821 I wouldn't really call this an internals question, but never-the-less.... On 21 Mar 91 18:37:01 GMT, howcome@media-lab.media.mit.edu (Hakon Lie) said: > How does sendmail figure out which machine to open an smtp session > with when the given email address is not ping'able? An example: MX records in the BIND servers. See line below that says "... mail exchanger" > So, sendmail maps from "forsk.teledir.no" to "nac.no" through > "forsk.teledir.no.tcp". But how? [saratoga:mips:t:21] nslookup Default Server: eros.pa.dec.com Address: 16.2.64.12 > set type=mx > forsk.teledir.no. Server: eros.pa.dec.com Address: 16.2.64.12 Non-authoritative answer: forsk.teledir.no preference = 50, mail exchanger = nac.no Authoritative answers can be found from: nac.no inet address = 129.240.2.40 ns.nasa.gov inet address = 128.102.16.10 ns.nasa.gov inet address = 192.52.195.10 ns.nic.ddn.mil inet address = 192.67.67.53 a.isi.edu inet address = 26.3.0.103 a.isi.edu inet address = 128.9.0.107 gunter-adam.af.mil inet address = 26.1.0.13 aos.brl.mil inet address = 192.5.25.82 aos.brl.mil inet address = 128.20.1.2 aos.brl.mil inet address = 128.20.0.7 terp.umd.edu inet address = 128.8.10.90 c.nyser.net inet address = 192.33.4.12 > > Thanks, You're welcome. James -- James Brister brister@decwrl.dec.com DEC Western Software Lab., Palo Alto, CA {uunet,sun,pyramid}!decwrl!brister "Old mathematicians never die; they just lose some of their functions."