On 5/18/07, Tony Earnshaw <[EMAIL PROTECTED]> wrote: > James Cort skrev, on 16-05-2007 15:00: > ... > > 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? > > It looks basically what I have to do this summer, though switching to > Red Hat 5 from RHAS4 and from 3-year old IBM hardware to new. That's how > I'll be doing things; people won't have access to their mail for a day > or so during school vacation. > > I've other production machines running CentOS 5 and Fedora FC6, so I've > enough experience with them. > > In the mean time I've updated Courier maildrop and IMAP several times to > the latest authlib, maildrop and IMAP, Postfix to 2.4 and the OpenLDAP > delta syncrepl backend to 2.3.35; the site has both DLT and rsync > disk-based backup methods for the IMAP mail hierarchy (the latter for > people who suddenly find they've deleted something they didn't mean to > and want it back immediately). > > However, we use a dedicated machine for mail, with virtual mail accounts > owned by a single user, in a single hierarchy - which is possible with > maildrop but not with procmail. Users have no shell access to the mail > server, their $HOME data directories are om different servers for > different services. > > One thing though, using a CNAME for an MTA with MX records is generally > deprecated though I can't find any rfc that forbids it; it can lead to > nasty things happening (think of reverse PTR records), google for '"mx > record" cname' if in doubt. > > Good luck (to both of us :)), > > --Tonni
I would suggest you lower your DNS refresh period a few days before migration. That would mean that servers will come more often to check if anything in you DNS has changed. It should be done a few days (maybe weeks) before because it needs to propagate to some servers who cache DNS info. Then the DNS part hopefully would be smoothier. Regards, -- Eduardo Bacchi Kienetz http://www.noticiaslinux.com.br/eduardo/ ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Courier-imap mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-imap
