How to start offlineimap systemd

[jose.wo@posteo.net]

Hello all!!

I'm sorry if my question is terribly simple but I'm a new debian
user. I have always been an archlinux user but now I've decided to
give debian buster a try.

Everything is working smoothly except offlineimap. Actually I works
well, the problem is that I can't start the systemd service.

I've tried like this:

systemctl --user start offlineimap
Failed to start offlineimap.service: Unit offlineimap.service not
found.

You can see that the service is not found. I have also tried starting
with socket activation but it is the same.

Is there anything obvious I'm not seeing?

Thanks a lot,
Jose.