Hi, On Thu, Sep 21, 2017 at 07:34:47PM +0100, Stroller wrote: > I apologise, because I'm sure this subject has been done to death, but I want > to migrate from Courier to Dovecot.
currently, I'm working on the same project here, > I think my main question is whether there's any reason I shouldn't just rsync > the maildirs across from the old mail server to the new one? probably that's not enough, to make a complete and clean migration, you'll be happy with the courier-dovecot-migrate.pl script: http://www.dovecot.org/tools/courier-dovecot-migrate.pl That converts all structure in-place from Courier to Dovecot. > There aren't many clients using this server, so I don't care if clients have > to redownload all their messages (in fact, I expect they'll probably end up > doing so anyway). without that the POP3 clients downloaded again all messages, but with that script, most clients was able to switch as transparently. (Except the MS Office Outlook - but that's not a "client" in my opinion... :)) > I'd like to preserve read/unread status of each message, but can't think of > anything else important. the read/unread status had been kept in case of IMAP, but the MS Office downloaded again through POP3, when I skipped the script above. > It doesn't matter if there's a few hours of downtime, but I thought to use > rsync because I figured I copy the maildirs a day or two ahead of time, and > then a sync immediately before going live will be quicker. > > Using imapsync [1] looks pretty good, and I'm happy to use that if it'll be > "cleaner" or help Dovecot to create its hierarchy more neatly. I didn't checked it, just doveadm ... imapc: command. The result was fine, but the POP3 redownload was annoying. > It looks like Courier creates a courierimapuiddb, courierimapkeywords and > courierimapacl in each folder - can I not just delete these, and hand Dovecot > a bunch of maildir directories and files to reindex for itself? I kept them... a. -- I � UTF-8
