[imp] IMP 3.1 / user@domain.ext on virtual domains

[Amith Varghese]

> One difference between what you're offering and what we want to offer is that
> we do not want to set up multiple URLs for IMP - ie. mail.domain.ext and
> mail.domain2.ext etc - we only want the one instance of IMP being accessed
> via
> the one single URL at http://webmail2.kabissa.org - at the same time we don't
> want preferences to be shared across domains and we want the default identity
> to contain the correct email address for the username.

So correct me if I'm wrong, but you basically don't want to use the
$_SERVER['SERVER_NAME'] or $HTTP_HOST variable.  You want all users to use your
domain when using IMP.  However you also want to be able to differentiate
between users from one domain to another.  So for example if you have
user@foo.com and user@bar.com you don't want them logging in as user because
their prefs will collide.  I think you want to use the vinfo hook but not in the
traditional sense.  

> My idea for solving the preferences and default identity problem is to have
> people log in with their full email address - username@domain.ext - which is
> then broken apart to be used as follows:
>
> username - to log in
> username@domain.ext - for preferences in IMP
> username@domain.ext - From address for default identity
>
> 7. I have the idea that this can be handled through hooks, but don't know
> enough abou it to know how. 

I think you can almost do this with the vinfo hook with a really small code
modification.  Basically you will want to enable the vinfo hook, but for just
your domain.  So your users are going to log in as

user@foo.bar@kabissa.org
|----------|
    ****
     **
This is what the user will enter.  

The @kabissa.org will be provided by the vinfo hook.  In the vinfo hook you can
strip off the @kabissa.org using some PHP code and use that for the user log
ins.  So now users such as user@foo.com and user@bar.com are differentiated
because internally you store their domain as part of their username.

Then to fix the problem with having the correct e-mail address for the user you
need to modify the function _prefs_hook_from_addr() and use PHP to manipulate
the username into something that you like.

The only Horde code that you would have to change is in login.inc.  In that file
it displays the vdomain (@kabissa.org in your case).  Basically you need to
silence the printing of this and I think that should cover all your needs. 
There might be some option to not display the vdomain, but I don't know of one.

Amith