No websocket (with stalwart)

[tttp]

Hi,

I'm using tmail as a webmail and it works quite well, but there isn't any auto-update (eg when a new email is received).

My understanding is that it should be done using websocket?
on the dev console/network, I don't see any ws, I don't even see any failed attempt to connect

on the .well-known/jmap, I do have a correct

urn:ietf:params:jmap:websocket

Do you have any suggestion on how to investigate? I'm not sure if the issue in on tmail, stalwart or just me misunderstanding the available features ;)

[dab246]

Hi @tttp

Same with #3860. I think you will find the answer in this comment #3860 (comment)