Hi there,
We searched for Slack workspaces you've already joined or are allowed to join, using ca-dev@letsencrypt.org. It looks like you have one! 
You can sign in to the following workspace:
Forgotten your password for this workspace? No problem! We can send you a password reset email.
If you're trying to join a specific workspace that isn't listed here, you can try contacting your Workspace Administrator for an invitation. You can also try a different email, or forge ahead and create a new workspace!
Please let us know if you have any other questions or feedback.
Cheers,
The team at Slack
