Wrong receiver address displayed

  • Hi,

    I have a kopano setup using ldap as the user backend.
    I have many users that have kopanoAlias adresses set in ldap (for example: user1@dmn.de has alias test@dmn.de)

    If the user receives a mail on the test@dmn.de address, the receiver address is displayed as user1@dmn.de.
    If I look at the header of the message, the To: field is correct (test@dmn.de).

    Any suggestions?

  • Kopano

    Hi @h44z ,

    yes it shows the original to in the header, since this is stored as received from the mta.

    But that you don’t see the alias in the WebApp has a reason as well. When a message is delivered by the dagent it will try to resolve all participants against the gab (and replace the individual recipient with a reference against the gab). This is done so that our clients can more easily look up free/busy and presence data.

    The simple workaround if you don’t want to have the user resolved against the gab, is to remove aliases from the gab.

  • Hi,

    thanks for the reply. But I cant remove the kopanoAlias from the user, because the user also sends mails using the alias address. If I remove the alias, the user gets an error message that he is not allowed to send from the alias address.
    It would be nice to have a setting to either display the user from the gab or the original To header field.

  • A short update:

    I have written a simple plugin for Kopano Webapp that allows the user to see the “original” receiver address.

    If the TO: header differs from the displayed receiver, the plugin will add a extra line to the email information.
    For Example:

    Gesendet: Montag 3 April 2017 00:20
    An: Max Muster <max.m@test.de>
    Original To: maxi.muster@gmail.com

    The plugin can be found here: https://git.sprinternet.at/zarafa_webapp/origrcv

    Even if I found a workaround using this plugin, a configurable option for Kopano Webapp would be a nice to have. @fbartels Where can I create a feature/bug request?

  • This is a problem for me too. For the moment I’ve included @h44z 's plugin to my installation as well but an option in dagent or webapp to disable this behaviour would be very much appreciated by me.

  • Hi,

    a Webapp plugin does not solve the problem. Emails synced via z-push still have wrong email, same goes for IMAP sync. Further the “sed -i” of kopano-dagent also works on attached emails (sic!). See picture

    0_1491837611821_Screenshot at 2017-04-10 17-47-59.png

    See post https://forums.zarafa.com/showthread.php?13528-Zarafa-Kopano-replace-alias-emails-with-email-of-user&p=58359&viewfull=1#post58359 for full problem explanation.
    Last but not least, to prove that it is a bug and not a feature, I have use of GAB disabled where possible (e.g. server.cfg: enable_gab = no). I use ldap plugin.

    A kopano-dagent setting to disable this behaviour would be greatly appreciated.


  • Yeah, I just noticed that the problem still appears on mobile/zpush. I’m probably just going to patch this out of dagent myself, and put it behind a config option. I can submit a patch/pull request to the kopano source tree if you guys take code?

  • Kopano

    @hpvb said in Wrong receiver address displayed:

    I can submit a patch/pull request to the kopano source tree if you guys take code?

    Sure, patches are welcome! You can find the contributing information at https://stash.kopano.io/projects/KC/repos/kopanocore/browse/CONTRIBUTING.md and as long as you make this behavior optional and non-default I don’t see a problem with it.

  • OK, I’m working on a patch but it’s a little harder than I thought. It seems there’s no explicit point in the code where this happens. I was looking in ResolveUsers() but I don’t think that’s it.

  • I actually ended up writing a DAgent plugin for this. This was way easier and a little easier for me to manage with regards to upgrades. It’d be nice if there were srpms for the open source packages :)

    This does only partially fix the problem though: From headers are still rewritten which is very confusing too :)

    Maybe this shows what my/our problem is though. I don’t know how much work it’d be to do this in DAgent directly.

    import MAPI
    import email
    from email.utils import getaddresses
    from MAPI.Util import *
    from plugintemplates import *
    class RewriteUsers(IMapiDAgentPlugin):
        def __init__(self, logger):
            IMapiDAgentPlugin.__init__(self, logger)
        def PreDelivery(self, session, addrbook, store, folder, message):
            headers = message.GetProps([PR_TRANSPORT_MESSAGE_HEADERS], 0)[0].Value
            msg = email.message_from_string(headers)
            to_addrs = getaddresses(msg.get_all('to', []))
            cc_addrs = getaddresses(msg.get_all('cc', []))
            names = []
            for addr in to_addrs:
                    SPropValue(PR_RECIPIENT_TYPE, MAPI_TO),
                    SPropValue(PR_DISPLAY_NAME_W, unicode(addr[0])),
                    SPropValue(PR_ADDRTYPE, 'SMTP'),
                    SPropValue(PR_EMAIL_ADDRESS, unicode(addr[1])),
            for addr in cc_addrs:
                    SPropValue(PR_RECIPIENT_TYPE, MAPI_CC),
                    SPropValue(PR_DISPLAY_NAME_W, unicode(addr[0])),
                    SPropValue(PR_ADDRTYPE, 'SMTP'),
                    SPropValue(PR_EMAIL_ADDRESS, unicode(addr[1])),
            message.ModifyRecipients(0, names)
            return MP_CONTINUE,

  • Kopano

    @hpvb thanks for posting the plugin. If you add some documentation and add upload it somewhere (be for example in a gist at Github), then you could also add it to https://stash.z-hub.io/projects/COM/repos/projects-and-resources/browse#Kopano-dAgent-Spooler-Plugins

  • @fbartels sure, I’ll setup a repository for it and add some documentation. This may be useful for others besides just me and the other two people in this thread.

  • Kopano

    @hpvb great. if you need any assistance let me know. If you don’t want to create a Github/Whatever account, then you could also create a personal git repo on stash.z-hub.io.

  • @fbartels Does this look OK to you?

    If so I’ll add it to that wiki page.

  • Kopano

    @hpvb did not test your script, but the description reads fine for me. Thanks for making a repository for it.

  • I’ve sent a PR for that repository. Thanks for your feedback.

  • @hpvb thanks a lot. Can’t wait for your patch to reach nightly builds.

  • @Pozzo-Balbi I didn’t end up writing a patch for dagent, but a plugin for dagent. You can get it here : https://notabug.org/hp/kopano-dagent-rewritegaladdresses. Once that is installed everything should start working. I’ve had it running for 5 days now without issue.

  • Can someone please fix the Plugin. It´s not working with Python 3 in Kopano 8.7


Log in to reply