Re: [Exim] Putting EXIM in Front Of Exchange

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著者: Glen Mehn
日付:  
To: Dave C.
CC: andrew, exim-users
題目: Re: [Exim] Putting EXIM in Front Of Exchange

Dave C. wrote:

>>What I've done successfully is to setup a double-DNS section.
>>Publically, you have
>>
>>   IN    MX    5    exim.yourhost.com.
>>    IN    MX    10    exchange.yourhost.com.

>>
>>(the reason exchange is on there is for failover-- the exchange machine
>>will receive mail if exim ever goes down, just that spam/virus/etc will
>>get through-- your risk, of course)
>>
>>Then, you make your intranet DNS servers route mail like this:
>>
>>    IN    MX    5    exchange.yourhost.com.
>>    IN    MX    10    exim.yourhost.com.

>
>
>
> Ugh. My god why? Just use a domainlist(exim3) or manualroute(exim4)
> router to tell the exim box where to deliver mail.. You shouldnt list
> internal servers in a public DNS at all.


The reason(s) for the exchange server are outlined below-- in case exim
goes down, etc.

This also allows you to use exim as your smtp server, splitting the load.

I realise this is a bit of a hack, but in the past, it's worked well
when I used mails for mon, et al, and had them routed to different
processes-- it was easy, quick, and it worked. Although,
domainlist/manualroute is a better option.

>>That way, incoming mails will hit the exim host first, then will route
>>to the exchange host.
>>
>>Again, you can (and I recommend) do this without exposing the exchange
>>boxes to the internet-- if you put the exim boxes in your DMZ, you can
>>have your exchange boxes on your intranet.
>>
>>You could also make an exim server with courier-imap, ldap, and some
>>shared calendaring software and get rid of exchange altogether :>
>>
>>-g
>>
>>
>>--
>>
>>## List details at http://www.exim.org/mailman/listinfo/exim-users Exim details at http://www.exim.org/ ##
>>
>>
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--
Glen Mehn
glen at burningman dot com    at zerowaitstate dot com    at doofdoof dot com
"If u ever devour the universe, remember to spit the dragon back out.xx."
                        -swan