Hi, I've been using MassMessage for years to despatch ''The Bugle'', the monthly Military History WikiProject newsletter, and never had a problem before now. The last issue I despatched on 7 May was sent out a second time on 8 May. Is there a bug or is it possible I put the thing on 'repeat' (didn't know there was such a thing though)...?! Cheers, Ian Rose (talk) 13:12, 8 May 2023 (UTC)
Topic on Extension talk:MassMessage
There is a long-standing occasional (unpredictable) bug (phab:T93049) that the devs have had difficulties diagnosing. However, it looks like there is a recent software patch drafted, and once that has been tested & reviewed & merged it might help prevent future occurrences.
I've been affected by this bug, too, so you have my deepest empathy. Thanks for reporting it here!