Error: roundcube connection to storage server failed#
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Hey guys,

I receive the above-mentioned error after installing Kolab on a fresh buster server, in accordance to the kolab online guide.
I fugured, that the problem is caused by the configuration during the kolab installation process.

For example:
netstat -tnlp | grep :143
shows a configuration only for tcp6. Tcp doesn’t even show up for the configuration process. The same is for all other ports except http and https.

I tried to globally deactivate ipv6 with the following commands:
nano /etc/sysctl.conf
net.ipv6.conf.all.disable_ipv6 = 1

unfortunately no changes. Could anyone give me some support please.

Thanks in advanced for your support!

Best Regards


Ticket Type

Event Timeline

vQEaVMHj created this task.Mar 31 2020, 2:49 PM
vQEaVMHj triaged this task as High priority.Apr 4 2020, 1:21 PM
pasik added a subscriber: pasik.May 3 2020, 4:51 PM
gpunk added a subscriber: gpunk.May 22 2020, 6:01 PM

I've had this problem on debian 8,9 and 10

I fixed it by "fixing" cyrus and guam , both were in a bad state because of incorrect SSL certificates .

Good luck

emunson added a subscriber: emunson.Nov 6 2020, 5:47 PM

I am now seeing this as well, opened a new issue: T6073