Use of a mailmap file with git-log

Hi

I'm working on a project for a large organisation that wants to make widespread use of git and the mailmap feature.

This seems to be supported by default in git-shortlog but not git-log (and other variants) without specifying custom formats, which isn't really something I want to try and 'fix' across the organisation. Is there a reason for this feature omission or has it just evolved that way and could it be fixed?

Thanks Rich