> I'm using SOGo for my family's groupware and although SOGo provide plugins for Thunderbird

I used to use SOGo but found it used way too much resources. None of us really even used 'webmail' so I ditched SOGO.

I went with https://radicale.org most of my family either uses mail clients, Thunderbird, (with Lightning), Canary Mail (the mac user), DAVx⁵ (formerly Davdroid). Radicale allows for ldap authentication which was a must for us.

On a side note the SOGO Integrator plugin took AGES to be updated for Thunderbird 60. I found https://gitlab.com/CardBook/CardBook/ to be WAY better, particularly as it replaces the crufty-old Thunderbird addressbook.

On a side note I have been curious about https://www.etesync.com but haven't tried that.

ActiveSync is the best email protocol but as far as I know is very costly. JMAP is comparable to ActiveSync but will see will gain enough adoption when RFC is finished.

Could you share your ActiveSync experience?

I've wanted to use z-push with a PSQL backend for a while, mostly to cut off gmail and repatriate my email archives

I personally found z-push very buggy. Also you need your own DAV servers for calendar and contacts AFAIK. I found Horde and SOGo much more reliable, I went eventually with SOGo as I thought it was weird using PHP for a long running server. With php stuff (horde and z-push) I had to edit too many timeouts etc.

Thanks, I was also considering sogo but I thought z-push would be more reliable as it is older.

I mean, people use it, it's not terrible, I just found it unreliable since at the end of the day it's a PHP app. Though Horde (which is also PHP) was miles better. I think z-push uses the php imap library, which is quite ineffecient. See https://wiki.horde.org/activesync#toc29

SOGo being written in obj-c means it's fundamentally much better suited to this task.