Fastmail OAUTH2: unable to configure

[andbenn]

Checklist

• [X] I have used the search function to see if someone else has already submitted the same bug report.
• [X] I will describe the problem with as much detail as possible.

App

Thunderbird for Android 8.0b3 K-9 6.804

App version

Thunderbird Android 8.0b3 K-9 6.804

Where did you get the app from?

Google Play

Android version

Android 14

Device model

Pixel 6a

Steps to reproduce

1. Settings
2. Choose my Fastmail account
3. Fetching mail
4. Incoming Server
5. Change Authentication from Normal Password to OAUTH2
6. Next
7. Please sign in ... Sign in
8. OAuth sign in failed. Oauth 2.0 is currently not supported with this provider

Expected behavior

I have OAUTH2 in Thunderbird desktop configured. I know it works.

Their server is mail.messagingengine.com My username is my core account, and is using one of their other domains they own, not the same as their server.

I'd like to migrate off of my application password to OAUTH2.

This also occurs in K-9.

Actual behavior

OAuth sign in failed OAuth 2.0 is currently not supported with this provider Retry

Logs

No response

[cketti]

Use these settings: https://autoconfig.fastmail.com/mail/config-v1.1.xml

Incoming server

Server: imap.fastmail.com Security: SSL/TLS Port: 993 Authentication: OAuth 2.0

Outgoing server

Server: smtp.fastmail.com Security: SSL/TLS Port: 465 Authentication: OAuth 2.0

[andbenn]

Wow, my config predates the current service documentation. Imagine that. Thanks @cketti

I'm able to get OAuth2 working in Thunderbird Android 8.0b3. Success and thanks!

However, K-9 6.804 still shows me the OAuth signin failed / ... not supported after tapping the Sign In button in the settings/config. Autoconfig issue perhaps? A future K-9 release for this to work?

Thank you!!

[cketti]

OAuth with Fastmail is only supported since 8.0b3