Multiple Identities: Anonymity

[Brady, Mike]

On 2014-03-24 09:44, hede wrote:
> Hi list,
> 
> my users are using several identities for varying contacts. But some
> mailers add a "Sender" header with the main [uid]@[domain] email
> address. And using some mailers the local received-headers get
> stripped off and with others they remain intact.
> 
> While I think a header announcing "(SquirrelMail authenticated user
> [uid])" is okay and I even have an idea why this sometimes gets
> removed and sometimes not (postfix strips local headers with
> "127.0.0.1" in header_checks.submission but squirrelmail connects via
> the public IP; btw. I wonder why because it's configured to use
> "localhost".)
> Thus this is ok, because everyone may know my internal user IDs...
> 
> But I don't know where the "Sender: [uid]@[domain]" header is coming
> from. It gets added with roundcube and android clients. Using
> Squirrelmail or claws-mail there is no such header. Is this client
> side or server side and how to switch it off?
> 
> Server is Kolab 3.2, single domain. I have installed squirrelmail
> locally for a faster alternate mail client (kolab runs off an arm
> embedded board), it's multiple times faster than roundcube.
> 
> regards
> hede

I am seeing something that is possibly related with the Bynari Outlook 
Connector where I am getting two sender headers, which is not valid.  
This only happens with the Bynari Connector.  The default Kolab Amavis 
configuration bounces emails with invalid headers, so not good.  I have 
changed the amavis configuration to let the emails through, but I am 
getting the occasional bounced email from remote sites because of the 
duplicate headers.

I have the Bynari Connector configured to use the MSA (port 587), which 
is also what Roundcube is using, but Roundcube only has the one sender 
header.  Is that how you have SquirrelMail configured?

A call has been logged with Bynari as well.

I will some more research on this today.