s3c0ndsky <here.there66 <at> yahoo.com> writes:

> 
> 
> hi guys.
> 
> need your help in setting up a postfix mailserver.
> 
> Basically I have a several mail servers which running different
> platform/software and hosting quite a number of domains.
> Now, all I want to setup is ... a single smtp-auth server using postfix
> which serves as an outgoing smtp server for all those domains... 
> So I need this postfix  server to auth the users to their respective mail
> server using imap/pop authentication first before sending out the email.
> I also have a remote ldap server which stores the domainname-> mail server
> hostname.
> 
> Let say that user1 <at> domainA.com needs to authenticate to postfix... the
> postfix will need to query the ldap server first to find out the mailserver
> of domainA.com in order to do pop/imap auth.
> 
> So was wondering if anyone can point me into the right direction.. I have
> been googling and I came across to sasld ? using rimap ? But it looks like
> you can only setup rimap to authenticate to a single server ?
> 
> any input would be appreciated.
> 
> thanks in advance

s3c0ndsky: +1! And no replies to this question since 2009... Did you find
the/another solution? 

@Others: I Googled for days, weeks to find a -simple- solution for this.
Using SASL rimap option, where multiple imap servers where users/domains
reside are tried to authenticate. Or where we can provide domain:server
mapping on where to authenticate users of which domain. We have several
shared hosting servers that we want to keep isolated, but provide a central
secure outgoing smtp server (including 587 submission port with an official
certificate etc. to satisfy out-of-the-box security measures of the latest
mailclient versions) that can be used by authenticated users from those
different servers.

Any simple alternative to achieve the same goal, without setting up a bunch
of extra (complex) services and/or connections between these servers is also
no problem. We already have a basic system in place that generates
domain:server mappings (for central dns management).

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