Roundcube identities

[Sebastian Albrink]

Hi all!

After using Kolab 2.x for several years, I just set up a Kolab 3 test
environment. It's up and running on CentOS 6.3. Thanks for the great work!

While playing around with the new system, I noticed that I cannot set a
custom identity in Roundcube. This is the error message I get:

postfix/submission/smtpd[7568]: C66C53FF58: reject: DATA from
localhost[127.0.0.1]: 554 5.7.1 <DATA>: Data command rejected: Could not
find envelope sender user some_identity at myothermailaddress.net;
from=<some_identity at myothermailaddress.net>
to=<test_destination at expample.org> proto=ESMTP helo=<my.mail.domain>


Is this a bug or a feature or did I miss something during setup?

Regards,
Sebastian