Username different from mailbox

[Torsten Schlabach]

Hi Patrick,

> - an inofficial cyrus patch or

Well, I hope it will become part of the codebase as soon as it has been found to work properly. But in practice, it is going to take some time until that version will make it into package repositories. Ok, sounds like that story is back to me. ;-(( But ...

> - an imap/pop3 proxy server (perdition)

Nobody had brought this up before. Thanks! Sounds like it might even be the short term solution for us.

Regards,
Torsten


-------- Original-Nachricht --------
Datum: Wed, 07 Mar 2007 14:21:22 +0100
Von: Patrick Kranz <p.kranz at ekits.de>
An: info-cyrus at lists.andrew.cmu.edu
CC: 
Betreff: Re: Username different from mailbox

> Hi Torsten, hi list,
> 
> first of all thanks for the many answers and thanks to torsten for 
> making my question clear :)
> 
> so far, two possible solutions have been mentioned here:
> 
> - an inofficial cyrus patch or
> - an imap/pop3 proxy server (perdition)
> 
> i had no chance to talk to my customer yet but i guess the proxy server 
> will be the solution of our choice because i still can use the updates 
> for the cyrus server provided by the distributor without the need to 
> recompile it by hand every time there is an update.
> i have investigated a little and found out, that perdition actually 
> supports ldap, so it is possible to still keep all relevant data in the 
> ldap-dit.
> 
> if anyone is interessted in the final setup and if it worked, don't 
> hesitate to mail me but i think in the matter of this mailing list this 
> case is closed :)
> 
> thanks for your help.
> 
> best regards,
> patrick
> 
> 
> Torsten Schlabach schrieb:
> > Hi Patrick, hi all others,
> >
> > This is *not* an MTA issue at all as soon as we discuss the IMAP user 
> > logging in rather than the MTA delivering mail!
> >
> > This has been discussed indeed several times already and every time it 
> > came up, there were several people answering that they have no problem 
> > with that all. Yet unfortunately, they weren't talking about what was 
> > asked and what you need. (As long as I didn't get it wrong.)
> >
> > It is crucial in this discussion to distingish between two things:
> >
> > 1. Teach the MTA (Exim, Postfix, doesn't really matter) that mail for 
> > x at y.com has to go to fillinwhatyoulike / what at have.you. Yes, this is a 
> > no-brainer. So we discuss SMTP here, which isn't really a subject for 
> > Cyrus IMAPd at all. And it's not what you're asking if I get it right.
> >
> > 2. In IMAP a user uses a name to identify himself against Cyrus IMAPd. 
> > The respective data is flowing right from the MUA (not the MTA) to 
> > port 143. Note: No Exim / Postfix / qmail in the game.
> >
> > Cyrus itself is indeed built on the assumtion that whatever name you 
> > use to authenticate *is* the name of the mailbox you want to see.
> >
> > It is impossible to use any tricks in the LDAP backend to solve this. 
> > You will be able to make LDAP lookup the credentials for userb if he 
> > logs into Cyrus as usera (if you do whatever mapping in LDAP) but this 
> > will always result in a "no mailbox with that name error" as Cyrus 
> > IMAPd will authenticate correctly, but look for the wrong mailbox name.
> >
> > The only way to solve your (and my) problem will be a canon_user SASL 
> > plugin, which does not yet exist.
> >
> > Well, sort of ...
> >
> > Howard Chu was so kind to write one which he provided to me as patch. 
> > Due to a lack of time and maybe ability I was yet unable to make it 
> > work for me. But I definitely trust him that when he says he had this 
> > working for him, that the problem is with me and not with his code.
> >
> > So in case you are ready to compile your stuff from source, I will 
> > happliy share the patch with you and I would be extremely thankfull if 
> > you could help me with some hints on how to properly install that.
> >
> > Regards,
> > Torsten
> >
> >
> > Jorey Bump schrieb:
> >> Patrick Kranz wrote:
> >>
> >>> Now I have a customer, who needs the scenario that the usernames for 
> >>> Cyrus differ from the mailbox and mailaddress respectivly. For 
> >>> example user1 at testdomain.com should be able to login with the 
> >>> username someOtherUsername. This need arises from an integration 
> >>> with other software-packages. Is there any possibility to make this 
> >>> work?
> >>
> >>
> >> Yes, this is no different from any other alias or virtual setup that 
> >> offers multiple addresses to individual users. You would handle this 
> >> in the MTA. For example, I use virtual_alias_maps with Postfix, and 
> >> map all addresses to the corresponding cyrus IMAP user:
> >>
> >>  abuse at example.com        admin
> >>  admin at example.com        admin
> >>  postmaster at example.com        admin
> >>  bob at example.com        bob
> >>  robert.smith at example.com    bob
> >>
> >> You can also use the aliases file and other approaches.
> >>
> >>
> >>
> >> ----
> >> Cyrus Home Page: http://cyrusimap.web.cmu.edu/
> >> Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
> >> List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
> > ----
> > Cyrus Home Page: http://cyrusimap.web.cmu.edu/
> > Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
> > List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
> 
> 
> -- 
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> Oliver Epper, Patrick Kranz
> EK IT-Solutions
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> 54634 Bitburg
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> Fax: +49 (0)6561 12425
> 
> ----
> Cyrus Home Page: http://cyrusimap.web.cmu.edu/
> Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
> List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html