[Exim] backup MX setup...

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Autor: Matthew Dunham
Datum:  
To: exim-users
Betreff: [Exim] backup MX setup...
folks -

so i'm in the process of getting exim to do some backup mx'ing for my
single domain. i think my configuration is pretty straightforward, but
having poked around a bit at the docs, config examples, and postings i'm
still not 1000% sure on how this'll work.

i plan to have 3 mx records for my domain with preferences of, say, 0,
10, and 20. the highest preference mx (0) will be the main server with
the other two as backup mx's.

in the case of a main server outage, the next highest preference (10)
will spool mail for the main server as long as i've set my domain in
relay_domains. correct? and then if both (0) and (10) are out, the
preference (20) server will spool the messages. so when the
lower-preferenced systems come back up, the preference (20) server will
dump its spooled messages based on the local_domains setting? and it
does this based on the retry configuration?

and what transports/directors/routers need to be set up to mediate this
dumping of spooled messages to the lower-preferenced servers? or is this
handled automagically by the relay_domains setting?

thanks in advance for any advice....

-- 
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   Matthew E. Dunham          |   dunham@???
    Instructional Computing    |   805 893-7687
      University of California  |   805 893-8758 fax
       Santa Barbara, CA 93106   |   http://www.ic.ucsb.edu/~dunham
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