I get SPAM from "(trash characters).onmicrosoft.com". Your filter does not handle wildcards
I get SPAM from "(trash characters).onmicrosoft.com". Your filter does not handle wildcards??? Really???

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Nigel Moore commented
I now have 150 of these in my blocked addresses that all start with just a@ ...
Most yahoo email functionality is superb (comparing it with gmail for example) but the inability to disable what is self-evidently spam is just abjectly and embarrassingly AWFUL.
Here are my 150 - you, dear reader, may notice a certain similarity even if it seems the yahoo email team cannot: (Ah, I'm only allowed to post 5,000 characters)
a@bdfberherhe.onmicrosoft.com
a@bdfbfdhreht.onmicrosoft.com
a@casovjskdj.onmicrosoft.com
a@dazdzdzaaz.onmicrosoft.com
a@dbdfbrtjtrjrtj.onmicrosoft.com
a@dbdfhrthjrt.onmicrosoft.com
a@dbftyjtyt.onmicrosoft.com
a@dbjtyjytjktyk.onmicrosoft.com
a@dfbdbrth.onmicrosoft.com
a@dfbdfbdfbdfbrttrtr.onmicrosoft.com
a@dfbdfhrtfdgrt.onmicrosoft.com
a@dfbfdberhjhrt.onmicrosoft.com
a@dfbfdbr4tujhtyj.onmicrosoft.com
a@dfbfdbtyjyukjuy.onmicrosoft.com
a@dfbfdhrthrtjkrtfgn.onmicrosoft.com
a@dfbfdrtjjuty.onmicrosoft.com
a@dfbfgntyjyt.onmicrosoft.com
a@dfbftjtyjtgf.onmicrosoft.com
a@dfbftyjtykt.onmicrosoft.com
a@dfbrhrtrthr.onmicrosoft.com
a@dfbrthrtrthrhrhrtr.onmicrosoft.com
a@dfbrtjrtjrtjfg.onmicrosoft.com
a@dfbtrrtjtrjrtjrt.onmicrosoft.com
a@dfbvrehrehe.onmicrosoft.com
a@dsfbefdhber.onmicrosoft.com
a@dsfbfdbrehe.onmicrosoft.com
a@dsfdhnbrthjtr.onmicrosoft.com
a@dsvdsfbgthrtr.onmicrosoft.com
a@dsvergheer.onmicrosoft.com
a@dsvrthtrfg.onmicrosoft.com
a@dsvsdjhutyyuku.onmicrosoft.com
a@dsvsdvgeger.onmicrosoft.com
a@dzaazdgzadhjza.onmicrosoft.com
a@dzadzadzadzaz.onmicrosoft.com
a@dzahgdhgzaf.onmicrosoft.com
a@dzahhdhgzafdza.onmicrosoft.com
a@dzayzadgyzadg.onmicrosoft.com
a@dzdzaza.onmicrosoft.com
a@dzdzazaddza.onmicrosoft.com
a@dzjhdazajgdzajhdz.onmicrosoft.com
a@dzzadaz.onmicrosoft.com
a@ergergererejjj.onmicrosoft.com
a@fazdzadzad.onmicrosoft.com
a@fazdzadzadf.onmicrosoft.com
a@fazdzadzazda.onmicrosoft.com
a@fazdzdzadzzd.onmicrosoft.com
a@fdberjhejerzs.onmicrosoft.com
a@fdbr4tjytjytj.onmicrosoft.com
a@fdbrtjrtjrtjtr.onmicrosoft.com
a@fdebrtjrtjkiytk.onmicrosoft.com
a@fdererre.onmicrosoft.com
a@fezfezfzezeezf.onmicrosoft.com
a@ffazdazzadza.onmicrosoft.com
a@ffazdzadaz.onmicrosoft.com
a@ffdfadzaadz.onmicrosoft.com
a@fghtjrtjktrkt.onmicrosoft.com
a@fjkazbzfjkbf.onmicrosoft.com
a@fzadzadazdza.onmicrosoft.com
a@fzadzadzadaz.onmicrosoft.com
a@fzadzadzadazf.onmicrosoft.com
a@fzadzadzaddd.onmicrosoft.com
a@fzadzadzadzaz.onmicrosoft.com
a@fzadzadzadzazad.onmicrosoft.com
a@fzadzafazdaz.onmicrosoft.com
a@fzadzafazfaz.onmicrosoft.com
a@fzadzafzada.onmicrosoft.com
a@fzadzafzadaz.onmicrosoft.com
a@fzadzafzadzadza.onmicrosoft.com
a@fzadzazadaz.onmicrosoft.com
a@fzadzdzadazfza.onmicrosoft.com
a@fzajkbzajhdvjza.onmicrosoft.com
a@fzdazdzafzaf.onmicrosoft.com
a@fzdzaazd.onmicrosoft.com
a@fzdzaddzad.onmicrosoft.com
a@fzdzaddzzad.onmicrosoft.com
a@fzdzadzaaz.onmicrosoft.com
a@fzdzadzadz.onmicrosoft.com
a@fzdzadzadzaddd.onmicrosoft.com
a@fzdzadzadzza.onmicrosoft.com
a@fzdzadzafzadz.onmicrosoft.com
a@fzdzadzaz.onmicrosoft.com
a@fzdzadzazad.onmicrosoft.com
a@fzdzadzazadff.onmicrosoft.com
a@fzdzadzazddd.onmicrosoft.com
a@fzdzafazadz.onmicrosoft.com
a@fzdzazaddza.onmicrosoft.com
a@fzdzazazafzfzadaz.onmicrosoft.com
a@fzdzdzadzazad.onmicrosoft.com
a@fzedzadza.onmicrosoft.com
a@fzefdzadzaz.onmicrosoft.com
a@fzfzadzafzdaz.onmicrosoft.com
a@fzfzafgezgezfze.onmicrosoft.com
a@fzfzafzadza.onmicrosoft.com
a@fzzadzazdaf.onmicrosoft.com
a@gefezfzezeez.onmicrosoft.com
a@gfntrrthrtsdre.onmicrosoft.com
a@hazdzajhzadh.onmicrosoft.com
a@hjvzazadzzahf.onmicrosoft.com
a@hrgregerer.onmicrosoft.com
a@jzayhdvzahj.onmicrosoft.com
a@lhzavdhjdv.onmicrosoft.com
a@rthtykjtyujtyfg.onmicrosoft.com
a@sberherhdfbdf.onmicrosoft.com
a@sderhehrt.onmicrosoft.com
a@sdvdserhrt.onmicrosoft.com
a@sdvdsgererhhh.onmicrosoft.com
a@sdvdsgerge.onmicrosoft.com
a@sdvdsreherh.onmicrosoft.com
a@sdvdsverhrtjh.onmicrosoft.com
a@sdvdsvezrge.onmicrosoft.com
a@sdverhtjyt.onmicrosoft.com
a@sdvregergregre.onmicrosoft.com
a@sdvrfdegerger.onmicrosoft.com
a@sdvrthhrthhrt.onmicrosoft.com
a@sdvsdererheherh.onmicrosoft.com
a@sdvsdger.onmicrosoft.com -
Brad Cross commented
Fix the filters. Aso allow ME to create a filter that moves trash to SPAM folder and notify you. I see key words like LOAN, sexual stuff, etc that I see a pattern to filter. I also had a person sign up for loans and somehow used my email address here and now I am flooded with his trash. If I could filter his name if found in the body.