Debian default mailer choice

[Stefan Monnier <monnier@iro.umontreal.ca>]

Why does Debian default to installing Exim4?

I just crossgraded two machines (i386->amd64 and armhf->arm64) in
different ways (once with `crosssgrader` and once with a fresh install
followed by manual reconciliation) and in both cases I ended up with
Exim4 installed while I had started with Postfix.

I don't have anything against Exim4 (I just happened to choose Postfix
many years ago and never had a reason to reconsider that choice).
I know basically nothing about Exim4 other than the fact that installing
Postfix instead saved a few kB (nothing very significant in the grand
scheme of things).

So here I am, wondering why Exim4 is favored this way.


        Stefan