podcast (7 October 2015) http://bikeshed.fm/35
“Do you use a private or work e-mail when pushing git commits to repositories.”
The question is worth asking yourself as it's (also) 'bout attribution of work you have done in either a public (fx GitHub) or private (fx Internal) domain.
The use of .mailmap partially solves the issue if you have by accident used multiple e-mail addresses when pushing commits in the past. But consider your opinion going forward…
“Do you stick with using one single e-mail of your own or the company provided one.”
Looking back myself I will probably (!) stick with using my own mail address for all git commits I do in the future. As attribution back to me becomes easier and the knack of using .mailmap will be (mostly) a thing of the past! (plus gitlab community edition does not yet support the .mailmap functionality!)