Replaced previous stablereq (Bug 930092) as they were blocked on arm and x86 due to a test failure, which should be fixed now in -r1 :-) Thanks!
arm done
amd64 done
arm64 done
Looks like x86 was keyworded at the same time as amd64. https://gitweb.gentoo.org/repo/gentoo.git/commit/net-mail/mu?id=e6a208244f17f44e1e64e9597c78fec919275613