sendmail

[James Brister]

I wouldn't really call this an internals question, but never-the-less....

On 21 Mar 91 18:37:01 GMT, howcome at 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 at 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."