For some reason bug 625846 was closed without the work needed to actually get all ebuilds using security vulnerable webkit-gtk removed from tree (newer stabilization and old ebuilds removal), so here's a new one that blocks the security cleanup. Please ACK stabilization of net-mail/mu-0.9.18-r2 and removal of older versions/revisions afterwards. This bug shouldn't be considered FIXED until old ebuilds are removed.
net-mail team ACKs, go ahead with your stablereq & cleanup.
x86 stable
amd64 stable