[imp] imap server depending on user

[Francesco Gringoli]

Hi Scott,

thanks for this hint but I already know Perdition: I'm using it into the
mail server I admin (with ldap maps to hidden real username).

The problem is that Perdition, like any other proxy I have found,
is not able to, let's say, masquerade the folder hierarchy:
Cyrus uses ".", while UW uses "/".
So you can find problem with client like IMP that are not
100% IMAP auto-configuring (since it deeply relies on
the c-client UW lib which knows just "/" hierarchy).

Apart from this, there are other issues with proxies
that have to be managed directly by clients (IMP here).
So I'm changing IMP code to have server settings
depending on the username which logs in.

Thanks
Francesco Gringoli

At 09.32 03/09/2003 -0400, you wrote:
>On Wednesday 03 September 2003 06:46, Francesco Gringoli wrote:
> > could it be possible  to have server settings depending on the username
> > that logs in? (server address, port an folder and so on)
> > I do not mean a user which choose the server on the login screen.
> > Suppose, instead, that users cannot choose the server at all...
> > They do not know anything about the server but some
> > users are on a server, others on another server, some users
> > rely on a Cyrus imap server,
>
>Look into an open source program called "Perdition" (search on Freshmeat.net).
>Perdition is an IMAP4 and POP3 proxy. You load it onto a machine that is the
>externally-visible IMAP and POP server for your users, and which has an
>appropriate generic hostname (imap4.example.com and pop3.example.com, for
>instance).
>
>Behind the generic server sits your private network, with an arbitrary number
>of IMAP and POP servers on it. They need not be of the same type, nor even
>running on the same operating system, so long as they use the standard
>well-known ports.
>
>Next, you have an OpenLDAP directory with an entry for each user. These
>entries have the "mailhost" attribute set to the fully-qualified hostname
>of the user's actual email server.
>
>Properly configured, Perdition accepts the IMAP4 or POP3 connection from
>the user, then asks for their authentication credentials. It uses the
>login name to look up the mailhost attribute from LDAP. Then Perdition
>makes a connection to the *real* server on behalf of the user, presents
>the credentials to that server, and establishes a simple port forwarding
>proxy connection. From that point on, the user is interacting with their
>physical mail server via a transparent proxy on the Perdition server.
>
>I have deployed this setup into an ISP's email environment, and have found
>Perdition to work very well.
>
>Scott
>
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