Hi,

I'm looking to migrate an existing courier-imap installation from one 
server to another.  My concern is that if I get something wrong, it may 
not be apparent until rather late in the process and there's a risk of 
data loss.  I can't seem to find anything in Google which suggests I 
might hit a problem, however I'd like to get a second opinion from the 
list before I go charging in.

Current scenario:

1 x Gentoo server.

Emails are received through sendmail, processed through procmail and 
picked up by users using courier-imap.  The mail storage is in maildirs 
- some 60GB of them - all rooted in /home/<USERNAME>/.maildir.

Desired scenario:

1 x Debian Etch server

I'm not sure what I'll end up using as the MTA (but it must support 
Sendmail-style aliases files, and I've got Postfix in a number of places 
so that's a strong possibility), processed through procmail and picked 
up using courier-imap.  Maildirs will remain housed in 
/home/<USERNAME>/.maildir

There will be no hardware similarities between the two servers, and very 
few configuration similarities.  They will have different hostnames, IP 
addresses.  My plan is to shutdown courier-imap and rsync -a the 
maildirs from the source to the destination server. 

Once complete, I'll CNAME the old IMAP hostname to the new one, users 
will connect to the new IMAP server.  With any luck, I'm hoping that the 
end result will be a transparent migration.

Have I got the right idea?

Many thanks,


James Cort
-- 
U4EA Technologies
http://www.u4eatech.com


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