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From: Vivek Khera (vivekkhera.org)
Date: Thu Dec 27 2007 - 15:33:05 CST
On Dec 27, 2007, at 3:03 PM, Jay Chandler wrote:
> What I'd like to do is have the gateway (Postfix based, obviously)
> is first check its own alias maps. Assuming no match is found, I'd
> like it to query the new server's LDAP instance to see if a user
> exists; if it does, hand the mail to that server. If not, I want it
> to query the old server's MySQL database to see if the user exists.
How long is this migration expected to take? Can you force the maps
to be immutable for that time? If so, then take a snapshot of the
valid users and put it in a file based map until the migration is done.