[imp] Dynamically choosing server via e-mail address in login screen.

[Anant S Athavale]

I/We have a requirement like this.

We are running two web servers called isacmail1 and isacmail2.  We have 
divided
the users into 2 servers.  LDAP has an attribute called servername, which will
have a value of isacmail1 or isacmail2.  The users who have isacmail1 as the
servername will be allowed to login to isacmail1 only and similarly for
isacmail2.  The mailboxes will be in their respective servers, that way they
are independent systems.  Both have the same copy of LDAP (master/slave).  The
sql tables are also independent.  ie. isacmail1 contains data of only 
isacmail1
users in the sql tables.

I would like to have a another system, where user types in login and password
and the system should automatically take the user to isacmail1 or isacmail2
depending on the value of attribute servername of LDAP (directly to INBOX of
that system).

Presently, we are asking for only username in the third server and after
checking the username from LDAP we are pointing the user to the correct server
where he has to type username and password.

What Jan is telling in this mail may be relevant to me.  But, if somebody can
give me PHP code to that, I will be greatful.

Regards,
Anant.



Quoting Jan Schneider <jan at horde.org>:

> Zitat von MNSi Customer Service - Nicolas MacPherson <nickm at mnsi.net>:
>
>>    This is my first post, and firstly, I'm not versed at all in PHP.
>> (though I plan on diving headlong into it shortly)  I've been using IMP
>> 3 on my small ISP's site for over a year now with no issues.  My ISP was
>> absorbed by another, and the new ISP has asked me to install a new IMP
>> server for their mail system.  My issue is that they have 2 servers that
>> my standalone IMP setup connects to.  The first only has POP
>> connectivity for the time being, (we plan on upgrading it to qmail+IMAP
>> soon) and the second server is running QMail+VPopmail+IMAP with over
>> 500+ domains on it.  My question is whether or not there is a method of
>> IMP choosing which server to connect to by the e-mail address entered
>> into the login prompt.  The POP machine only has a single domain, so
>> basically it seems like it could be dealt with by a scenario where if
>> they type in the singular domain, it uses the POP server, and any other
>> domain would attempt to utilize the other.  Or am I totally barking up
>> the wrong tree?  Any assistance would be greatly appreciated.  BTW, both
>> machines are using IMP 3.2.7.
>
> With IMP 4 you could use a pre_authentication hook, but such an
> automatic selection based on the entered user name is not possible with
> IMP 3 without hacking the code.
>
> Jan.
>
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