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Re: Maildirs in Debian

----- Original Message -----
From: <Jorge.Lehner@gmx.net>
To: <debian-isp@lists.debian.org>
Sent: Thursday, August 01, 2002 8:49 PM
Subject: Re: Maildirs in Debian

> Hello!
> On Fri, Aug 02, 2002 at 09:06:07AM +1000, Jeff Waugh wrote:
> ...
> > There are plenty of reasons to not use Maildir, too.
> ...
> On Fri, Aug 02, 2002 at 09:26:29AM +1000, Jeff Waugh wrote:
> ...
> > No. I use maildirs on my IMAP server and mboxes on my desktop because
> > are appropriate to each. They operate very differently, and have
> > for different uses.
> ...
> Please elaborate on the disadvanteges of having Maildir as system
> mailbox.
> Regards,
> Jorge-León

One advantage of maildir vs mbox formats comes with doing incremental
backups to tape with tar.

With mbox, the whole file will get backed up with every incremental backup
if it is changed. If you have clients using IMAP or don't check their email
often, you wind up with lots of big files. With spam and viruses arriving
all the time, most mailboxes are getting changed daily.

In my experience, incremental backups on mbox files do not save much space.
For instance, I have about 12Gb worth of mailboxes, and an incremental
backup using tar of only files modified within the last day, is usually
about 11Gb.

With maildir, I would imagine that an incremental backup would be much
easier, as you'd only have to backup the last few messages that have
arrived, though I haven't actually tried it.  Comments from anyone who

If you wanted to do efficient backups of mbox format messages, I suppose
that rsync to another drive or system would probably be best.

Kirk Ismay
System Administrator

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