RE: [exim] forward non local users to other server

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Author: Matthias Läßig
Date:  
To: Marc Sherman, exim-users
CC: 
Subject: RE: [exim] forward non local users to other server
Indeed. That is a very good solution. I'm wondering why I didn't come up
with that myself....
;-)

How would I define that in the config file??? (I'm pretty new to exim and
only worked with sendmail before).

Big Cheers!
/matthi.

-----Original Message-----
From: Marc Sherman [mailto:msherman@projectile.ca]
Sent: Monday, February 28, 2005 3:00 PM
To: eli-list@???
Cc: Matthias Läßig; exim-users@???
Subject: Re: [exim] forward non local users to other server

Eli wrote:
>
> Quite possible indeed, however your configuration for Exim will highly
> depend on how you store your users in MySQL. I assume if you have
> gotten that far that you have something in your RCPT ACLs that checks
> for local users or not - you need simply extend that to have Exim also
> accept RCPTs for the remaining domains you haven't migrated. Several
> options are at your disposal, such as a simple domain name check, or
> looking at MX records, etc...
>
> At routing time, if the user isn't in MySQL, pass it to another router
> that uses manualroute or something to do a smarthost type set up.


An easier/cleaner solution might be to first put all users in the MySQL
database, with a column indicating which server their email is currently
handled by. You can have exim route the mail according to that column, and
as you migrate users, just change the value in that column.

That way, you don't need to worry about callouts for recipient verification
or anything like that to avoid backscatter when spam is sent to non-existant
users.

- Marc