I can’t currently sign up to liquibase.jira.com. My email is rejected as not coming from an allowed domain:
Whoops! The email address provided is not from an allowed domain.
Seems to be a recent Jira OnDemand regression, and maybe the same issue as:
https://jira.atlassian.com/browse/AOD-7398 - Self Sign up cannot be enabled in OnDemand
Workaround (according to AOD-7398): “Please contact Atlassian Support to have a workaround applied to your instance.”