How to connect to Fastmail?

[jdeluyck]

I want to test out Bulwark, but since I don't fancy setting up a stalwart mail server yet, I decided to try it against Fastmail.
I've been trying all kinds of things but .. I'm a bit stumped on how to actually set up the connection to the fastmail jmap server?

API url: https://api.fastmail.com/jmap/session/ (I think) - the other option is https://api.fastmail.com/jmap/api/

I've created an API token on the fastmail interface, and I can query the session endpoint when specifying the token as a bearer token, but Bulwark doesn't seem to like either endpoint nor the credentials.

Can anyone shed some light on how to connect this to FM?

[rathlinus]

Can you show me what it says under https://app.fastmail.com/settings/migration/apps

[jdeluyck]

In the end I managed to get it working using a proxy that sent the api token as a bearer token along with each call made to the fastmail endpoints. Bulwark only sends it as basic auth, which is not supported by FM.