Samba is not installable
reported in talk.do
sambapackage cannot be installed.
A test on a virtual machine with the current version seems to indicate a policy violation for the security overlay:
samba in the jessie-security repository is at version 2:4.2.10+dfsg-0:deb8u3, but some of the sub-packages are still at the non-security repo version of 2:4.1.17+dfsg-2+deb8u2. samba-common (the main one causing this issue), samba-doc, libsmbsharemodes0 and libsmbsharemodes-dev are affected. Should just need to get these packages up to date in jessie-security to resolve this.