For your edification, below, in domain rank order (from the https://domcop.com/openpagerank/ API), are the ranked domains that have bounced at least one DMARC aggregate report my mail server has tried to send them since I started tracking this in September 2018.
There are a lot of domains on this list that are big enough that they really should be able to handle something as critical as not bouncing aggregate reports sent to the email address they advertise for them. As of today I am removing all of these domains from the list of domains that I don't send reports to, to see how well things have improved since then. I'll send out another list at some point. ------------------------------------------------------------------------ youtube.com google.com cnn.com yahoo.com mozilla.org indeed.com psychologytoday.com gmail.com samsung.com flattr.com nrdc.org lastpass.com code.org malwarebytes.com yandex.com provincie-utrecht.nl imf.org alibaba.com starbucks.com johnlewis.com trendmicro.com dmarc.org pobox.com vudu.com square.com bt.com lookout.com 163.com intuit.com usaa.com webpronews.com shopee.sg daum.net hsus.org aliyun.com joinallofus.org kakaocorp.com tom.com lee.com teladoc.com slt.lk alice.com actblue.com support.com comune.messina.it delawarenorth.com yahoo.fr hebrewcollege.edu onehanesplace.com brief.me petrolina.pe.gov.br injixo.com moi.go.th smilefoundationindia.org googlegroups.com julianforthefuture.com service.com yahoo.de ymail.com dor.state.ma.us srft.nhs.uk johnlewis.co.uk yahoo.it pik.ru mikasa.com ppfa.org airtelbroadband.in factsmgt.com jooble.org casanare.gov.co zooprinting.com zol.co.zw lhl.no totallyjewishtravel.com ibarra.gob.ec hanmail.net sacmex.cdmx.gob.mx btconnect.com hallandpartners.com spindustry.com inbox.ru ult.edu.cu waterfall.social stae.org.mz in.net naseej.com jaispring.com stom.ru 2164.ru grad.ufsc.br tufts-health.com sahapat.co.th cones.gov.py mail.bg yahoo.pt worldofcombats.com kbcnet.rs wcasd.k12.pa.us cct.edu.za muthootgroup.com diresacajamarca.gob.pe alligator.ru vresp.com 4cresults.com hosdenar.gov.co blueline.co.id seiv.co.id keel.com.tw benhviendongnai.vn dnow.com mdmedia.co.id proseleccion.es chinalutian.com vit34.vn veloci.com.mx chinastars.com.cn shopeemobile.com cnhengsen.com baojiechina.com hamavaran.com fotomerchanthv.com barrowdems.com fnh.mil.hn sbvamc.vn freetrupsoc.co painbudy.us zohomail.eu 9centers.life techno.bid policia.gob.ec korzina.org luzhongmc.com bit.co.id shopatbest.com pmholding.ru projetorhd.best aircoolll.co powerrefficiency.co projectornanohd.co ultimateherp.pro
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