This was reported on IRC, capturing it here so it's not missed
18:12 <roy649> Not sure if this is an SRE thing or not, but several of the mailing lists I'm subscribed to on lists.wikimedia.org had my Delivery Mode set to None without me doing it. 18:12 <roy649> Is this a known problem? 18:19 <jynus> No idea, but could it be a result of the recent migration? T367521 18:23 <mutante> i'd be surprised if it was since list settings are in the DB backend and the DB did not change 18:24 <mutante> never say never though 18:28 <roy649> The lists for me were cu-ombuds-l, checkuser-l., and functionaries-en 18:28 <roy649> were those part of that migration? 18:37 <RhinosF1> roy649: all lists were 18:38 <roy649> Then this is rather a mystery