* Stéphane MERLE <stephane.me...@distrigame.com>: > Patrick Ben Koetter a écrit : >> * LuKreme <krem...@kreme.com>: >> >>> I am planning on recompiling postfix and all its various helper apps >>> (switching from cyrus to dovecot, upgrading mysql, Maybe setting up >>> LDAP, and doing a clean install of FreeBSD latest) onto a newer, and >>> hopefully more capable machine. >>> >>> What I want to do is get the new system built and configured and >>> tested and then swap it in to replace the old machine. >>> >>> My question is what is the best way to actually migrate the mail and >>> the users to the new machine without losing mail? WOuld it be a good >>> idea (or even possible) to run the two machines in parallel for a >>> time, having all new mail go to both of them so I can then remove >>> the old machine once I see that everything is working? >>> >> >> Run the machines in parallel. >> Migrate users first and modify to fit the new environment if needed. >> Then start syncing messages. >> >> When you move from Cyrus to something else you can't use a file to file copy >> mechanism, since the Cyrus mailbox format is non-standard. There probably is >> a >> conversion script out there that converts Cyrus mailbox to e.g. Maildir, but >> IMHO there's a far better way. >> >> Use imapsync <http://www.linux-france.org/prj/imapsync/README> to sync >> IMAP messages between the old and the new machine. >> >> - it doesn't care about mailbox formats since it does IMAP from one machine >> to >> the other >> - it also migrates all IMAP flags (seen, unseen, etc.), which you would loose >> on a simple file to file copy migration >> - using IMAP to sync also creates the Dovecot specific mailbox index, which >> file to file copy migration doesn't either >> - you can exclude folders like INBOX/Trash from migration >> - and ... last but not least ... you can rewrite folders e.g. sync >> "INBOX/sent items" to "INBOX/Sent" on the new machines if you need to. >> >> > don't you need to know the users passwords to imap like this ?
Yes, you need to know the passwords or you exchange them for something you know while you sync and switch back afterwards. p...@rick
