Is usage of debian email address appropriate while contributing to other free software projects?

Hi,

While pushing commits to debian packages, I have my @d.o configured in global gbp.conf and hence
that address applies to my commits to packaging contributions. However, I have another non @d.o
address in gitconfig.

When I push commits to repos in debian without gbp, it leads to commits going with non d.o address.
Furthermore, I have to double think if I should use my @d.o when I am forwarding debian
patches to upstream projects v/s when I am not.

All of this is adding to some confusion and more often than not leading to commits with a mix
of addresses. I don't see any guideline for usage of debian address. Hence, I'd like to ask
is it fine to use @d.o address for all and any free software related work including address
on commits and even communicating on (other) mailing lists?