in tree over 30 days without issues or changes, x86 already has it stable, so amd64 and ia64 should follow, please CC arches if you think so too. i can say that it works fine on amd64.
upstream has appeared to have stopped developing. There are verification bugs in dkim-milter that have been fixed in opendkim. I'm not quite prepared to find them all and port them across. opendkim is an active fork with a stable request there in bug #317981. I'd rather continue to support opendkim. On that basis I'm going to close this. Sometime in the future I will probably remove dkim-milter.