Hello,
As a part of our existing mail setup we've got something like this :
Internet ==> MX ==> Server1 ==> Backend1
Internet <== Server1 <== Backend1
Backend1 handles SMTP authentication and is used as the end users' SMTP
server in their MUAs whenever they want to send emails to anywhere (even
internally). When sending, Backend1 forwards to Server1 which sends to
the Internet or sends back to Backend1 if needed (dest on same domain).
Server1 is an old release of Postfix which mostly handles virtual maps
expansion and mailing lists, and then forward all messages to a
different MTA (not Postfix) located on Backend1 which is the final
destination.
For a few users only, we are planning to have, in addition to
the setup above :
Internet ==> MX ==> Server1 ==> Backend2
Internet <== Server1 <== Backend2
Where Backend2 is a Debian Wheezy machine hosting Postfix 2.9.6
So we've modified our transports on Server1 to read something like :
example.com relay:[Backend1-IP]
newu...@example.com relay:[Backend2-IP]
...
So incoming messages passing through Server1 and sent to
any...@example.com are delivered to Backend1, excepted for the messages
sent to newu...@example.com which are delivered to Backend2.
So far so good, it works perfectly.
But now we want 'newuser' to use Backend2 as his SMTP server to
authenticate and send messages to anywhere.
In particular we want that messages from "newu...@example.com" (migrated
to Backend2) to "any...@example.com" (not migrated yet from Backend1 to
Backend2) still pass through Server1. In fact, even a message from
"newu...@example.com" to "newu...@example.com" should still pass through
Server1.
Unfortunately Postfix on Backend2 tries to deliver such messages
locally, instead of forwarding them to Server1 first.
Any idea how to achieve the desired result without creating any nasty
loop ?
FYI the transports map on Backend2 is empty
On Backend2 mydestination is defined as :
mydestination = example.com, backend2.example.com,
localhost.localdomain, localhost
The long term goal is to migrate all users, one at a time (upon request)
from Backend1 to Backend2.
Thanks in advance for any pointer or help.
PS : of course the lists of migrated and not migrated yet users id and
email addresses are known
--
Jérôme Alet - <jerome.a...@univ-nc.nc> - Direction du Système d'Information
Université de la Nouvelle-Calédonie - BPR4 - 98851 NOUMEA CEDEX
Tél : +687 290081 Fax : +687 254829
