Last modified: 2014-07-23 05:37:06 UTC
[[Special:CentralAuth/MediaWiki message delivery]] currently only lists meta.wikimedia.org. It should list many other wikis (cf. [[Special:Contributions/MediaWiki message delivery]]). This may be a bug in CentralAuth, not in MassMessage.
I guess we could check if CentralAuth exists and just take over everything. The only reason it exists on meta is because I manually created that account beforehand to reserve the name.
This bug has been marked with the "easy" keyword, but I'm not sure how to resolve it. :-(
I manually merged the account on the WMF cluster, so the page looks fine now. But the original issue still stands.