Thanks you for your answers/input. I have had several instances on mailing lists lately, where people would tell me what
I should have done, could have done and never actually answer my question. So THANK YOU.
As for upgrading. That is what the test server is for. This is a company email system and there is no room for error.
When the time comes (after testing the new server) I will have about 6 hours to move all accounts without losing any
messages.
Again thanks you for the help and suggestions.
Tony
> -----Original Message-----
> From: exim-users-bounces@??? [mailto:exim-users-bounces@exim.org] On Behalf Of W B Hacker
> Sent: Thursday, January 25, 2007 6:37 PM
> To: exim users
> Subject: Re: [exim] DNS MX records
>
> Tony Heal wrote:
> > I am going to try and stand up a second email server. This server will start
> > as a test server and then be moved into production. To begin with what I
> > would like to do is set it up using the same email domain as my current
> > email server and only have selected users ported over. Here are my problems
> > with this.
> >
> >
> >
> > 1. DNS MX records - How can I have 2 email server? I already have a
> > second and third email server set up for mail bagging set at priority 10 and
> > 20. Can I set up a forth MX with a priority between the first(5) and
> > second(10) at say 7? Will this cause emails to first go to the primary email
> > server (5) then if a recipient is not found try the second MX record(7)? I
> > am not real sure how all this works.
>
> Probably better and easier to either:
>
> A) partition a single server by use of virtual users and routers. As you have
> separate IP available, you can even use different 'races' of POP/IMAP daemons
> as well as segregating smtp by IP (needs Exim 4.X for ease of setup).
>
> If all are in the same <domain>.<tld>, OTOH, then you will need to rely on acl's
> or routers to split them out by $local_part lookups.
>
> B) use a single 'published' mx as a selective relay host, splitting traffic to
> separate non-published back-ends via private addressing, optionally lmtp instead
> of smtp.
>
> Not hard to configure MUA to use different boxen for reading and sending.
>
> > 2. related to the first but a little different. Is there any way on a
> > debian Linux system using a very old version of exim (3.35) to have a system
> > user with no email address, so that I can set myself up on the test email
> > system, or do I have to simply forward my emails.
> >
>
> Debian Linux users should read and heed Deb-specific docs, but the 'general
> case' would be to NOT use the conventional system/alias lookups.
>
> Either re-point that router to a specified flat file/DB/CDB or per-domain
> dirtree of such of your own, separate from the default user sources.
>
> OR - remove it entirely and go 'fully virtual' for simplicity - entering only
> the subset of local/shell-account users that you wish to have 'inbound' mail
> accounts.
>
> Also *strongly* recommend upgrading Exim 3.X to current release.
> Security, feature set, and availability of current support are the primary reasons.
>
> Too few here remember 3.X and even fewer are interested in messing with its
> configuration to do the unusual.
>
> Bill
>
>
>
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