Not only that: Dovecot 2.4 will also remove the functionalities of dsync, replicator and director [1]. This is frustrating and a big loss as these enabled e.g. very simple and reliable two-node (active-active) redundant setups, which will not be possible anymore with 2.4.

I use it for years to achieve HA for personal mail servers and will now have to look for alternatives -- until then will stick with Debian Bookworm and its Dovecot 2.3.

[1] https://doc.dovecot.org/2.4.0/installation/upgrade/2.3-to-2....

I usually fix those kind of problems by running the offending software in a docker container, with the correct version. Sometimes the boundaries of the container create their own problems. Dovecot 2.3 is at https://hub.docker.com/r/dovecot/dovecot/tags?name=2.3

You might be interested in https://codeberg.org/errror/dovecot-replication.

Thank you!

> I use it for years to achieve HA for personal mail servers and will now have to look for alternatives

Yeah, Dovecot seem to be going hardline commercial. Basically the open-source version will be maintained as a single server solution. Looks like if you want supported HA etc. you'll have to pay the big bucks.

There is a video up on YouTube[1] where their Sales Director is speaking at a conference and he said (rough transcript):

"there will be an open source version, but that open source version will be maintained for single server use only. we are actually taking out anything any actually kinda' involves multiple servers, dsync replication and err some other stuff. so dovecot will be a fully-featured single node server"

Have you looked at Stalwart[2] as an alternative ?

[1] https://youtu.be/s-JYrjCKshA?t=912 [2] https://stalw.art/