Re: Large scale Postfix/Cyrus email system for 100,000+ users

["Tom Metro-12" <user=71@nabble.blu.org>]

 Matt Shields wrote: 
> ...how do I get postfix to transfer the email to the particular IMAP 
> server that the user account is on. 

You want to set up a custom transport table: 

   TRANSPORT(5) 

   The optional transport(5) table specifies a mapping from email 
   addresses to message delivery transports and next-hop hosts. 
   ... 
   This mapping overrides the default transport:nexthop selection that is 
   built into Postfix: 
   ... 
       virtual_transport (default: virtual:) 
         This is the default for final delivery to domains listed with 
         virtual_mailbox_domains. The default nexthop destination is the 
         recipient domain. 
   ... 

   Normally, the transport(5) table is specified as a text file that 
   serves as input to the postmap(1) command. 

But you can substitute a configuration file that specifies a MySQL 
query. See the man page for more info on the types of searches 
transport(5) runs against your database, how to employ wildcards, and 
what it expects to get back. 

  -Tom 

-- 
Tom Metro 
Venture Logic, Newton, MA, USA 
"Enterprise solutions through open source." 
Professional Profile: http://tmetro.venturelogic.com/

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