How can I validate my Bitbucket email for SourceTree registration?

[efc]

When I try to register SourceTree with my Bitbucket email and login, I get a message that says that my email need to be validated to continue. However, I can't find any option to send a validation request from Bitbucket. How do I validate my Bitbucket email?

By the way, I don't have any trouble logging in to Bitbucket itself or receiving emails at this address from Bitbucket.

[efc]

I think I just figured this out. The login required is NOT a Bitbucket login but an Atlassian login. This is quite confusing and not at all explained in the SourceTree UI. Using my Atlassian login did the trick.