premail 0.46-10 is marked for autoremoval from testing on 2017-01-29
It (build-)depends on packages with these RC bugs:
806037: gnumail: FTBFS when built with dpkg-buildpackage -A (No such file or directory)
828572: tkrat: FTBFS with openssl 1.1.0
844845: tkrat: FTBFS: osdep.c:445:40: error: dereferencing pointer to incomplete type 'X509 {aka struct x509_st}'