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Re: Exim - mail delivery on a LAN

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A long time ago, in a galaxy far, far way, someone said...

> No, you've just not yet realized it.  8^)  Read
> /usr/share/doc/exim/spec.txt.gz and skip to section 29 on the
> lookuphost router.  One of the options there is called 'gethostbyname'
> and causes exim to use the gethostbyname() function instead of relying
> on DNS (of course, gethostbyname can use DNS, in addition to
> /etc/hosts, LDAP, NIS, whatever).

Doh!  You're right - I didn't look very closely at the spec ;)

> There is one major problem with using this option, though: using
> gethostbyname prevents MX records from being used as that library
> function doesn't handle any MX stuff.  That isn't a good thing at all.

No, it's not.

But it is simpler for those who don't want to be bothered to implement DNS
for everything to work right.

> There is a way to handle this, and to use gethostbyname only for mail
> matching a specific domain.  I don't know off hand how to do this,
> though, and I don't have the time to read through spec.txt in as much
> detail as I need.  I do believe, however, that it would result in a much
> cleaner and easier to maintain exim.conf than the solution you're using
> now.

It would probably involve LDAP or MySQL (or some other database type) to
match which host handles which domain name in a virtual-hosting- type


- -- 
- ----------------------------------------------------------------------
Phil Brutsche				    pbrutsch@tux.creighton.edu

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