MassMessage is unable to deliver messages at all. It interprets all delivery targets as just Special:
All logs contain Delivery of "[Subject line]" to Special: was skipped because target was in a namespace that cannot be posted in
and Special: is redlinked.
Example Logs:
- https://www.mediawiki.org/w/index.php?title=Special:Log/massmessage&offset=20190423020307&limit=3 (the 3 tests I made, 1 with a plaintext Subject-line (which didn't help))
- https://www.mediawiki.org/wiki/Special:Log/massmessage
- https://fr.wikipedia.org/wiki/Special:Log/massmessage
- https://ru.wikipedia.org/wiki/Special:Log/massmessage
Other newsletters are encountering this too, per
I also tried with 2 formats of delivery-target lists, and delivering one locally just from/to Mediawiki.org, but all tests had the same problem.
- https://meta.wikimedia.org/wiki/User:Quiddity_(WMF)/Tech_News_test_list (standard wikitext {{#target:....}} list
- https://www.mediawiki.org/wiki/User:Quiddity_(WMF)/massmessage_test_list (content-model: MassMessageListContent)