Server did not provide an Implementation string

[Andreas-Duffner]

If I see in the "Debug/Console" the string "Server did not provide an Implementation string", does that mean the server does not have sieve installed or at least not correctly configured?

I am using Debian with Exim4 and DoveCot, would I need to install more for it to be able to be modified by this program? If so, do you happen to know what I'd need to install and where to look for a correct configuration?

Edit:
I found out the port for a sieve filter should be 4190, it don't have anything listening on that port on my server and of course I did not open yet the firewall for it.
So it seems I either need DoveCot to start something or install something extra. Anyone proficient here who can give me a hint?

[thsmi]

Don't be confused Sieve and ManageSieve are distinct.

Sieve is a kind of programming language to define mail filters. An interpreter is shipped by default with dovecot.

ManageSieve is a protocol to externally edit Sieve script. To my knowledge dovecot does neither ship or enable ManageSieve by default. The dovecot ManageSieve implementation is called pigeonhole (https://github.com/dovecot/pigeonhole) and the documentation including configuration instructions can be found here (https://doc.dovecot.org/admin_manual/pigeonhole_managesieve_server/)

If you check the Debian packages, you can see dovecot-core suggest dovecot-sieve but it does not suggest dovecot-managesieved. This means dovecot-managesieved won't be installed by default.

[Andreas-Duffner]

Thank you very much! It took me a long time to try it, but "I HAVE NO EXCUSE"! :-)
This worked well. I am not sure if the filter I created is executed, but at least now I can connect to the server, create scripts and activate them.

Do you happen to know if the scripts shown in the application "Manage Sieve Scripts" are read from the server? The real meaning of my question is, do I need to backup the scripts or can I - after a fresh installation of a new pc - just install the sieve application and add the server/user and it reads all the scripts from the server?