Summary: The DANE domain count is now 4,022,036 (3,988,988 last month)

The number of domains that return DNSSEC-validated replies in response to MX queries is 23,122,328 (23,098,096 last month). Thus DANE TLSA is deployed on ~17.39% of domains with DNSSEC. For more stats, see https://stats.dnssec-tools.org/.

[ The credits[0] list is below my signature. ]

Reminder: If you're relying on trust-anchor (usage DANE-TA(2)) TLSA records matching a Let's Encrypt issuing CA, please note important upcoming changes in Let's Encrypt certificate issuance:

https://list.sys4.de/hyperkitty/list/dane-users@list.sys4.de/message/HESAY65... https://list.sys4.de/hyperkitty/list/dane-users@list.sys4.de/message/GLRVY2C... https://list.sys4.de/hyperkitty/list/dane-users@list.sys4.de/message/X4SS2EE...

As of today, I count ~4.02 million domains with correct SMTP DANE TLSA records at every primary MX host that accepts connections[1]. As expected, the bulk of the DANE domains are hosted by the DNS/email hosting providers who've enabled DANE support for the customer domains they host. The top 20 MX host providers by domain count are below.

This month Last Month ---------- ---------- 1305552 one.com 1306568 one.com 308177 hostpoint.ch 306621 hostpoint.ch 223679 infomaniak.ch 219246 infomaniak.ch 181030 jouwweb.nl 172777 transip.nl 173116 transip.nl 172069 jouwweb.nl 170668 mijndomein.nl 170317 mijndomein.nl 135204 argewebhosting.nl 137375 argewebhosting.nl 129324 simply.com 130652 simply.com 111973 hostnet.nl 111485 hostnet.nl 110214 domeneshop.no 109779 domeneshop.no 106668 loopia.se 106544 loopia.se 88592 webhostingserver.nl 89264 webhostingserver.nl 83114 zxcs.nl 82634 forpsi.com 82996 forpsi.com 81475 zxcs.nl 48550 protonmail.ch 47296 protonmail.ch 41346 antagonist.nl 41179 antagonist.nl 37932 active24.com 38161 active24.com 35799 webreus.nl 36259 webreus.nl 28089 pcextreme.nl 28643 pcextreme.nl 27964 xel.nl 28102 xel.nl

The real numbers are surely larger, because I don't have access to the full zone data for most ccTLDs, especially .br, .cz, .eu, .no, .be, .pl, .de and .uk. Speaking of countries, the IPv4 GeoIP distribution of DANE-enabled MX hosts shows the below top 20 countries (each unique IP address is counted, so multi-homed MX hosts are perhaps somewhat over-represented).

This month Last month ----------- ---------- 12241 TOTAL 12019 TOTAL 3906 DE, Germany 3819 DE, Germany 1972 NL, The Netherlands 1948 NL, The Netherlands 1912 US, United States 1929 US, United States 871 FR, France 905 FR, France 486 CZ, Czechia 481 CZ, Czechia 414 GB, United Kingdom 380 GB, United Kingdom 290 FI, Finland 287 FI, Finland 245 CA, Canada 212 CA, Canada 221 CH, Switzerland 199 CH, Switzerland 193 AT, Austria 186 AT, Austria 166 SE, Sweden 176 SE, Sweden 156 DK, Denmark 160 DK, Denmark 152 AU, Australia 148 AU, Australia 121 SG, Singapore 117 SG, Singapore 121 PL, Poland 103 RU, Russia 103 RU, Russia 93 PL, Poland 66 NO, Norway 67 NO, Norway 57 JP, Japan 57 JP, Japan 56 BR, Brazil 49 IT, Italy 53 IT, Italy 49 BR, Brazil

IPv6 is less common than IPv4 for MX hosts, and the top 20 countries by DANE MX host IPv6 GeoIP are:

This month Last month ---------- ---------- 9761 TOTAL 9592 TOTAL 4263 NL, The Netherlands 4210 NL, The Netherlands 2849 DE, Germany 2791 DE, Germany 905 US, United States 888 US, United States 417 FR, France 390 FR, France 210 CZ, Czechia 202 CZ, Czechia 180 GB, United Kingdom 185 GB, United Kingdom 109 FI, Finland 113 FI, Finland 87 CA, Canada 86 CA, Canada 80 CH, Switzerland 80 SE, Sweden 78 SE, Sweden 75 AU, Australia 75 AU, Australia 72 CH, Switzerland 52 AT, Austria 50 AT, Austria 46 SG, Singapore 44 SG, Singapore 36 JP, Japan 39 JP, Japan 32 RO, Romania 31 RU, Russia 30 BR, Brazil 31 NO, Norway 29 RU, Russia 29 RO, Romania 29 NO, Norway 29 BR, Brazil 28 DK, Denmark 26 DK, Denmark 18 LT, Lithuania 16 IE, Ireland

There are 10,719 unique zones (10,449 last month) in which the underlying MX hosts are found. This counts each of the above providers as just one zone, so is a measure of the breadth of adoption in terms of organizations deploying DANE SMTP.

The number of published MX host TLSA RRsets found is 24,636 (21,169 last month). These cover 24,945 distinct MX hosts (21,466 last month, some MX hosts share the same TLSA records through CNAMEs).

The number of DANE domains that at some point were listed in Gmail's email transparency report is 1,199 (1,173 last month, this is my ad-hoc criterion for a domain being a large-enough actively used email domain). Of these, 683 (674 last month) are in recent (last 90 days of) reports (see [2] below my signature).

Of the ~4.02 million DANE domains, 14,204 (14,456 last month) have "partial" TLSA records, that cover only a subset of the (secondary) MX hosts. While this protects traffic to some of the MX hosts, such domains are still vulnerable to the usual active attacks via the remaining MX hosts.

The number of domains with incorrect TLSA records or failure to offer STARTTLS (even though TLSA records are published) stands today at 2,424 (1,862 last month). Some of these have additional MX hosts that don't have broken TLSA records, so mail can still arrive via the remaining MX hosts. The affected domain counts for the top 10 problem MX hosts are:

550 mx2.xcellerate.nl 172 mx2.tkservers.com 123 mx2.dotxs.net 106 mx.xobit.nl 35 mx1.mdbraber.com 26 mail.orionpanel.nl 23 semark.dk 22 smtp2.kruik-it.nl 15 mail.nationaalarchief.nl 15 artemis.strebsjig.net

To avoid email outages, please make sure to monitor the validity of your own TLSA records, and implement a reliable key rotation procedure. See:

https://dane.sys4.de/common_mistakes https://github.com/internetstandards/toolbox-wiki/blob/master/DANE-for-SMTP-... https://mail.sys4.de/pipermail/dane-users/2018-February/000440.html https://community.letsencrypt.org/t/please-avoid-3-0-1-and-3-0-2-dane-tlsa-r... https://mail.sys4.de/pipermail/dane-users/2017-August/000417.html https://github.com/baknu/DANE-for-SMTP/wiki/2.-Implementation-resources

https://datatracker.ietf.org/doc/html/rfc7671#section-8.1 https://datatracker.ietf.org/doc/html/rfc7671#section-8.4

After eliminating parked domains that do not accept email, the number of "real" email domains with bad DNSSEC support stands at 697 (838 last month). The top 10 name server operators with problem domains are:

This Month Last month ---------- ---------- 490 neostrada.nl 528 neostrada.nl 58 worldnic.com 60 worldnic.com 21 openprovider.nl 22 openprovider.nl 21 active24.cz 21 active24.cz 14 sectigoweb.com 14 sectigoweb.com 13 register.com 13 register.com 7 dnssrv.nl 7 vultr.com 6 vultr.com 7 dnssrv.nl 6 ispapi.net 6 resolver.domains 6 forpsi.net 6 ispapi.net

If anyone has good contacts at some of these providers, please encourage them to remediate not only the broken domains (I can send them a list), but also the root cause that makes the breakage possible.

Just one of the domains whose nameservers have broken denial of existence appears in the last 120 days of Google transparency reports:

mailazy.net

-- Viktor.

[0] Credits: Hosting for the DANE/DNSSEC project is donated by isi.edu (Wes Hardaker and team). Wes also hosts and maintains the https://stats.dnssec-tools.org website. Thanks go to ICANN for sponsoring acquisition of the server hardware.

Coverage of DNSSEC domains continues to improve with ongoing data support from Chris Mikkelson from domaintools.com. Credits also due to ICANN providing gTLD data via CZDS, and to the ccTLD registries for .CH, .DK, .FI, .FR, .IS, .LI, .NL, .NU and .SE. More data sources of ccTLD signed delegations welcome.

[1] Some domains deliberately include MX hosts that are always down, presumably as a hurdle to botnet SMTP code that gives up where real MTAs might persist. I am not a fan of this type of defence (it can also impose undue latency on legitimate email). However, provided the dead hosts still have TLSA records, (which don't need to match anything, just need to exist and be well-formed) there's no loss of security.

[2] DANE domains appearing in last 90 days of Google Email transparency reports:

vbv.ag uni-augsburg.de maastrichtuniversity.nl univie.ac.at uni-bielefeld.de mailmore.nl gmx.at uni-erlangen.de mailon.nl boozyshop.be uni-muenchen.de mailplus.nl eos-contentia.be vicinityclo.de managementboek.nl triodos.be web.de markteffectmail.nl nra.bg westlotto.de mcmta.nl register.bg sanchezadv.digital mijndomein.nl dwvmail.com.br aeldresagen.dk mijnmagazines.nl e-negociacao.com.br allbuy.dk minbzk.nl e-renegocie.com.br annebrauner.dk mindef.nl pn1.com.br anodyne.dk minvenj.nl zaaztelecom.com.br avabeauty.dk mm1.nl defesa.gov.br barons.dk mulderretail.nl nic.br bigsaver.dk nefkens.nl registro.br bisgaardshoes.dk netpoint.nl activfitness-news.ch blandselvfroe.dk netpointfactoring.nl blackout-bonusclub.ch boblberg.dk nieuwsservice-rvo.nl creditum.ch bog.dk notbranded.nl escalade.ch borgerforslag.dk noties.nl gmx.ch bymelanie.dk ns.nl handy-abovergleich.ch bystinewinther.dk nuudcare.nl hostpoint.ch camillakroeyer.dk nuwegexclusief.nl infomaniak.ch casanova.dk okki.nl jobsmore.ch champagneklubben.dk oomverzekeringen.nl kalender-win.ch cillouettes.dk opnaarwonderland.nl msochrono.ch computerworld.dk otys.nl open.ch damask.dk ouderenfonds.nl protonmail.ch danskebank.dk ouderportaal.nl sherlockhomes.ch densidsteflaske.dk outlawevents.nl sms-gagnant.ch dfi.dk overheid.nl votreopinion.ch dressforsuccess.dk oxilionhosted.nl bionoble.co ejvinds.dk ozsw.nl simplelogin.co fibianet.dk partijvoordedieren.nl aim-care.com finesmile.dk partnermail.nl albourne.com fletkurven.dk podiumcadeaukaart.nl also.com foraeldresparring.dk politie.nl anonaddy.com frisorenogbaronen.dk pp-prd.nl ansigtsyogaonline.com gasolinegrill.dk previder.nl aotax.com gastrotools.dk proefdiervrij.nl boozyshop.com globestudios.dk prorun-mail.nl buroventures.com hook-up.dk pvv.nl canva-facile.com hostedsepo.dk quicknet.nl cm.com idelig.dk ranzijn.nl collarofsweden.com inkpro.dk rdw.nl connectsb.com iphoneopladere.dk rebirth-festival.nl conscience-et-realites.com ixstudioscph.dk rechtspraak.nl cornerstoneplatform.com kagegrisen.dk restaurant-sparkling.nl danskebank.com kisserpaludan.dk rijksoverheid.nl datev.com kk.dk rivm.nl denhaag.com kodbilen.dk rotterdam.nl detectiveforaday.com konkurspriser.dk rvig.nl eliteincomesociety.com kystfisken.dk rvo.nl explorer-hotels.com lacabra.dk sans-mail.nl fabfilter.com lammeskindet.dk schuurman-schoenen.nl farmergracy.com lederstof.dk scorion.nl fastware-hosting.com legekammeraten.dk shampoobars.nl flaneurhomme.com memery.dk shapeit.nl fromanteel-watches.com mobilcovers.dk shoesme.nl gearboxdigital.com modstroem.dk sizzthebrand.nl getpaidopportunities.com musclehouse.dk smartwatchbanden.nl gmx.com naturhandel.dk snowbass.nl goodforme.com netic.dk spamservice.nl grimfrost.com nexsmart.dk sportrusten.nl habitamat.com nfinitybeauty.dk ssonet.nl habr.com nimara.dk stage-app.nl hannahbarrettyoga.com nordd.dk stater.nl headachecalendar.com nordicsheep.dk steunactie.nl hedon.com nota.dk svr.nl highcharts.com online-mode.dk technicus.nl hwigroup.com perfectjeans.dk telefoonglaasje.nl imcnig.com qookware.dk thealphamen.nl infomaniak.com sengefabrikken.dk thefightcompany.nl ingthink.com seniornews.dk triodos.nl intakt.com shapeit.dk truetickets.nl johnbeerens.com sillysanta.dk tudelft.nl joomlapolis.com skjold-burne.dk u-mailer.nl jula.com smoon.dk uitgeverijpica.nl justpadel.com sneakerzone.dk upcmail.nl kabayarefashion.com stil.dk uvt.nl kae-cosmetici.com sygeforsikring.dk uwv.nl kheaa.com thenap.dk vacaturesonline.nl leszexpertsfle.com thesneakerstore.dk valys.nl librti.com trueliving.dk vandale.nl luvrefranco.com trustfitness.dk vimexx.nl mail.com viggo.dk vluchtelingenwerk.nl maileroo.com vind.dk vpo.nl mailzerver.com yuaiahaircare.dk vunzigedeuntjes.nl marsblade.com tilburguniversity.edu vvv-venlo.nl meriamecouture.com biotheka.ee watchbandjes-shop.nl mplbeauty.com holt.ee waternet.nl nanolearning.com maarahvapood.ee werkzoeken.nl nautisme-pratique.com minuvalik.ee woongarantvolmacht.nl nine-pine.com surveyturtle.ee ziggo.nl novashops.com turunduslabor.ee zorgmail.nl offshorecorptalk.com myownconference.email ankerstjerne.no one.com spam-filter.email annabellstefanussen.no orsys.com spotler.email babybanden.no ottobredesign.com talentech.email bull-ski-kajakk.no pieter-pot.com triodos.es chillout.no polyas.com egu.eu day-et.no pompomlondon.com finesoftware.eu dinholdning.no ppcpcv.com mailplatform.eu domeneshop.no protonmail.com qard.eu dressmykid.no run-motion.com rybarik.eu guttelus.no runbox.com zone.eu handelsbanken.no sankakucomplex.com zonevs.eu hoppin.no scienceshepherd.com danskebank.fi hypopressivtrening.no scorecloud.com f-solutions.fi hyttefeber.no serverclienti.com fsol.fi idrettenonline.no sisuknitwear.com handelsbanken.fi kashmina.no sneakerdistrict.com io-tech.fi lagerpriser.no solvinity.com metaburn.fi lillepr.no stasdock.com raumanteatteri.fi marikrogshus.no stater.com sillysanta.fi metaburn.no stellarequipment.com traficom.fi mystuff.no tcs.com ac-strasbourg.fr nordiskbylien.no theintercept.com boozyshop.fr norisma.no thelabelmachine.com braceletsmartwatch.fr norskgrammatikk.no thepcw.com compagnie-des-sens.fr raskebriller.no thepcwholesale.com edtm-actu.fr rushtrampoline.no thingsilikethingsilove.com oo2.fr smaaungene.no tibush.com passefranceallemagne.fr spillfabrikken.no trainwithlov.com privea.fr stilshoppen.no triodos.com fvap.gov strikkia.no tuftingshop.com fidesz.hu svippr.no tutanota.com italiamail.hu tickettothemoon.no up2staff.com marathonlife.hu veronicalill.no vivaldi.com nyirbatorvaroskartya.hu atelkamera.nu webcruiter.com zsibvasar.hu goget.nu xfinity.com bluebiz.info lenhud.nu xfinityhomesecurity.com j360.info skjutsgruppen.nu xfinitymobile.com eurocontrol.int agirpourlenvironnement.org zangra.com infinex.io calyxinstitute.org bncr.fi.cr simplelogin.io debian.org airbank.cz nuudcare.it freebsd.org akce-incomputer.cz neolink.link fridaysforfuture.org amenit.cz education.lu gentoo.org balikovna.cz etat.lu ietf.org bewooden.cz restena.lu isc.org cd.cz anonaddy.me mailbox.org cinemax.cz pm.me mailop.org cokoladovnajanek.cz proton.me netbsd.org cpost.cz army.mil openssl.org creammy.cz dla.mil ozlabs.org csob.cz dma.mil postfix.org csobstavebni.cz health.mil rfc-editor.org cuni.cz jten.mil samba.org dashofer.cz mail.mil torproject.org e-kondomy.cz navy.mil biotechnologia.com.pl ecps.cz nga.mil asf.com.pt ekokoza.cz osd.mil loopia.rs fio.cz socom.mil pinnbet.rs gov.cz spaceforce.mil mobily.com.sa hobynaradi.cz uscg.mil advisamail.se hypotecnibanka.cz usmc.mil arbetsformedlingen.se innogy.cz aifi.net bearplay.se itesco.cz comcast.net bearplayshop.se jumpfamily.cz ewetel.net bilprovningen.se kb.cz ficbook.net dingolfshop.se klenotyaurum.cz fivem.net ellevio.se klubpevnehozdravi.cz forwardemail.net epochtimes-mejl.se ksporting.cz gmx.net fotproffsen.se manymail.cz graphistepro.net getvibes.se mbank.cz habramail.net handelsbanken.se mfcr.cz hr-manager.net hellomantle.se mindsoft.cz intares.net inkrebel.se mkluzkoviny.cz mailanyone.net innebandy24.se mojedatovaschranka.cz masterinter.net jaramba.se mojemincovna.cz mijngezondheid.net jul-troja.se mrakyhracek.cz mpssec.net koreanbeauty.se muni.cz procurios.net kth.se nic.cz ripe.net kulturaktiebolaget.se o2.cz riseup.net livlyclothing.se opravdovezlociny.cz s-qrc.net lnu.se optimail.cz soverin.net lomervarde.se outlet-alpine.cz space.net loopia.se p-info.cz t-2.net merchsweden.se pivoteka.cz alexstory.nl metaburn.se poptavej.cz allevakantiehuizeninbelgie.nl minmyndighetspost.se scrptd.cz amsterdam.nl naprapatlandslaget.se server4u.cz aquastorexl.nl naturligtsnygg.se shopex.cz bankhoesdiscounter.nl nordd.se smtp.cz belastingdienst.nl nordicsheep.se sparkys.cz beterinbeleggen.nl polisen.se stoklasa.cz beterspellen.nl samblamail.se tefal.cz bewustpuur.nl sillysanta.se thinline.cz bhosted.nl silverdotter.se vas-server.cz blushfashionstore.nl skatteverket.se vitalpoint.cz bobo.nl skolverket.se vshosting.cz body-supplies.nl snbostader.se zafido.cz bolerolimonadewinkel.nl soleplus.se zdravestravovani.cz boozyshop.nl spelfabrik.se zonky.cz box.nl svenskhusman.se bayern.de bruut.nl teeshoppen.se brandenburg.de burgernet.nl teknikdelar.se bund.de carre.nl theletter.se datev.de casema.nl websupport.se dbtg.de cbr.nl agatinsvet.sk denic.de chello.nl bewooden.sk deutsch-franzoesischer-freundschaftspass.de citotoetsgroep4.nl coopka.sk dfn.de clubplanner.nl edirect.sk elster.de degros.nl fio.sk ewetel.de deonlinetandarts.nl gravirovane.sk fau.de derooijfotografie.nl hecht.sk freenet.de desan.nl mamaaja.sk gmx.de dewebmakers.nl mklozkoviny.sk hi7.de dictu.nl mnforce-panel.sk huellen-shop.de digid.nl nakupujzdravo.sk iks-jena.de dimehouse.nl nameserver.sk jpberlin.de dorcas.nl nlp-akademia.sk knauermann.de duo.nl partner.sk lmu.de esuals.nl penzionmara.sk lrz.de extinctionrebellion.nl poziadavka.sk mail.de ezorg.nl rondogo.sk mail2many.de fivecityspa.nl travelmail.sk mensa.de glamouryourhair.nl zapardrobnych.sk mpg.de hobbygigant.nl afinepairofshoes.co.uk posteo.de home.nl clientnews3.co.uk ruhr-uni-bochum.de hostnet.nl handelsbanken.co.uk sifjakobs.de huurexpert.nl millieandblake.co.uk sillysanta.de ikdeburger.nl nuudcare.co.uk smartwatcharmbaender.de inspirerendleven.nl thewordman.co.uk sys4.de interim-netwerk.nl triodos.co.uk taures.de jointherebellion.nl nuudcare.us tu-darmstadt.de josephinajewelry.nl quantum-services.us tum.de kiesrijk.nl ru.ac.za tutanota.de liveatamsterdamsebos.nl