Quick Note: There are related discussion threads (and listings) at these locations
https://www.mediawiki.org/wiki/Extension_talk:MassMessage
https://www.mediawiki.org/wiki/Extension_talk:Newsletter (#Drafting specs, in particular)
https://www.mediawiki.org/wiki/Movement_broadcasting (#See also, in particular)
http://lists.wikimedia.org/pipermail/ee/2014-January/000864.html

I'd suggest moving this issue into an RfC draft at mediawiki, for collaborative editing. (Or something)

See also bug 57935 and bug 43840 and bug 57937 (I won't add those to the Seealso-field here, to avoid spam. But once an onwiki location is chosen, someone should ping those bugs).

(In reply to Erik Moeller from comment #0)

MassMessage's notion of "targets" is not very user-friendly:

Yes. There's actually a GSoC project to fix this: [[mw:Extension:MassMessage/Page input list improvements]]

• Subscribers have to manually add their name in a special syntax on

multiple wiki pages. This makes the whole thing very hard to discover, and
makes it difficult to manage your subscriptions.

• Senders have to remember target-lists rather than being able to re-use

common targets easily.

What do you mean by "common targets"?

I think we can leave the current system in place and complement it with a
more user-friendly one:

• a list of newsletters, newsletter descriptions and target pages in the

MediaWiki: namespace

Once we switch to the ContentHandler based method, we can just use a special page to automate this.

• a tab in preferences that renders these out and makes it easy for users to

subscribe with their user talk: page (bonus points for indicating number of
subscribers)

I don't think this should be implemented with user preferences (that's bug 57935), but that shouldn't prevent us from listing them in Special:Preferences.