[NTLUG:Discuss] Single UID Mailbox for qmail use imap?

[greg hewett]

m m,

Just to add to Jack's comments, you do not have to authenticate to a mysql
database server.  You can also authenticate to an berkeley database on the
server called /etc/sasldb, which will only authenticate sasl enabled services,
and I think that postfix is on that list.  If you want to authenticate
outgoing mail, then you could use the same auth db (in theory).

Also, Jack, I am not sure what you mean about cyrus being harder to failover.
I do not mean to go further into a rabbit hole, but I am running cyrus-imapd
in a failover configuration, and I do not see how the way that the mail is
stored on the server would affect the ability to be easy to fail-over or not.
Unless you are talking about store the mail on an NFS server or filer, which I
would think would be nuts.

I want to see if I follow your config. There would be a NFS server, with the
MTA, and IMAP/POP servers all mounting the same NFS Server.  There could be
one or two MTA's, and a whole bunch of IMAP/POP servers.  You could either
front end this with perdition or DNS round robin type of approach, right?
Each of the mail servers (SMTP,IMAP,POP) are NFS clients?  Interesting.

My failover config is in a shared storage type of configuration, which is very
rare in linux. Actually my config is on Solaris with a bunch of over priced
hardware and software.

Greg


On Tue, Dec 18, 2001 at 04:38:20PM -0600, Jack Snodgrass wrote:
> Unless I missed somethig about Qmail, it's just a mail program like
> sendmail or postfix. It just receives the mail.
> 
> The server that your users connect to to get mail ( via POP or IMAP )
> is different.
> 
> I use Cyrus-Imap to do IMAP and POP. It runs a 'closed' mail store.
> No user access is allowed to the mail files. Users's ( the way I have it
> set up ) are authenticated via a mysql server. There are several ways
> to set it up so that you don't need to have real users setup in the
> /etc/passwd file.
> 
> Other IMAP servers that I've heard about are Courier IMAP and
> the UofW IMAP server. I think that both of those use 'user space'
> type mail stores so you do need to have users set up on the system
> to access their mail. ( I could be wrong about this ) One advantage
> that both of these have over Cyrus is that they allow you to have mail
> on a NFS ( or probably SAMBA ) remote file system. The way that
> Cyrus does it's mail ( and indexes ) you can't do this. This makes it
> a bit harder ( or impossible ) to set up a distributed or a failover type
> system.
> 
> jack
> 
> ----- Original Message -----
> From: "m m" <llliiilll at hotmail.com>
> To: <discuss at ntlug.org>
> Sent: Tuesday, December 18, 2001 10:22 PM
> Subject: [NTLUG:Discuss] Single UID Mailbox for qmail use imap?
> 
> 
> > Hi all:
> >
> > Is there any one has the experience set up imap account/boxes for Qmail to
> > provide email services for hundreds, even several hundreds of thousands of
> > people (email addresses, and POP3 boxes) using a single system UID (i.e.
> > each account does not need a separate system /etc/passwd style account).
> >
> > I know it can be done by use pop3 server, I like to know hot to setup it
> by
> > use imap server.
> >
> > thanks
> >
> >
> >
> >
> >
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