[imp] [horde] authentication active directory with fallback

[Guido Leisker]

>>2. Would it be possible to make a fallback to textlogin
>>(ldap/mysql/unix) if the 1st doesnt work, maybe because the active
>>directory is down, or he/she still has no account there?
> 
> 
> If horde is authenticating against your imap server and that imap 
> server is using PAM to authenticate, then it's possible to set up 
> multiple authentication sources in PAM with fallback.
> 
> For example, if using latest Redhat release of linux, run the 
> "system-config-authentication" tool and just check off all the services 
> that you'd like authentication to work with.
> 
> Be aware that that will modify the system-auth pam file and hence 
> effect all of your services on that server though. What we did was just 
> use that to build the correct pam file on a test box, then just named 
> that imap and copied that over the imap file in the /etc/pam.d dir.
> 
> 
Hm, I would use imp only to connect to foreign imap server.