We use the pivotal_git_scripts (https://github.com/pivotal/git_scripts) gem along with a .pairs file to set up a pairing session.
This modifies the git config so that the user.email value is a compound email address. It would also be possible to do this from the command line as follows:
git config --global user.email "dev.one+dev.two@example.com"
Bitbucket doesn't seem to be able to resolve this compound email address to the individual contributors.
Is there a known solution for this? Aliases don't seem to solve it ...