On 2017-05-28 19:30, s3v wrote: > rmail is currently uninstallable on Stretch: Well, you are switching your mta at the same time ... > # apt-get -o Debug::pkgProblemResolver=1 install rmail use apt-get install rmail exim4- > Please see #863367 for reference. We could make this more smooth with a Conflicts: exim4, but I don't think this change is worth an upload on its own. Andreas