Long-tail of email infrastructure — 2026-09-24

Deep-dive into the Unknown / Generic MX bucket — the deliverability reality outside the Google / Microsoft monoculture.

At a glance

Unknown / Generic11.30%76 364 domainsUnique unmatched MX36 716individual hostnamesSelf-hosted22.56%152 399 domains

What is this report?

Most landing-page summaries focus on the head of the distribution — Google Workspace, Microsoft 365, Yandex 360. About one in four domains in the Tranco top-1M lives outside that head: regional hosters, self-built Postfix/Exim, niche ESPs, corporate on-prem gateways. This is where most deliverability surprises actually happen. This page surfaces the raw long-tail so security researchers, deliverability teams and dictionary maintainers can mine it.

Top 1000 most common unmatched MX hosts

Sorted by number of domains using each. This is the practical feed-list — every entry near the top is a candidate for inclusion in our dictionaries/mx_providers.py. CSV download covers all 1000.

#	MX target	Domains
1	mail.levikof.com	810
2	localhost	539
3	mail	240
4	mail.parktons.com	180
5	mail1.sbnation.com	166
6	ms06.cv-library.co.uk	157
7	ms07.cv-library.co.uk	157
8	ms08.cv-library.co.uk	157
9	mail2.recop.jp	156
10	ns4.forevermail.com	154
11	alltheemails.com	150
12	mail.autoline.com.ua	139
13	mx2.z-ns.net	138
14	mx.email-messaging.com	133
15	mail.pickelhost.com	132
16	lbmx.bcc.gov.bd	127
17	entrap-01.hostns.io	120
18	entrap-02.hostns.io	120
19	entrap-03.hostns.io	120
20	s.mail.dcsaas.net	120
21	mxi.alpha-prm.jp	117
22	mx1d10.thinline.cz	114
23	mx1b20.thinline.cz	114
24	mx1.ticketsinbound.com	113
25	mx2.ticketsinbound.com	110
26	mail.mpcloud.net	109
27	mx-backup.serveriai.lt	105
28	~	102
29	mx.maxns.net	98
30	mx2.netim.net	89
31	mx1.netim.net	88
32	amazon-smtp.amazon.com	87
33	mailgw01.host.it	86
34	mail-fr.securemail.pro	86
35	mx.vshosting.eu	86
36	mailgw02.host.it	84
37	cloudmail.auto-vision.ru	83
38	mx-01.mail-forwarder.io	83
39	mx6.kvnbw.de	83
40	mx7.kvnbw.de	83
41	mx8.kvnbw.de	83
42	mx9.kvnbw.de	83
43	mail.vipmailservice.com	82
44	mx1-dk.centerasecurity.dk	81
45	mx2-dk.centerasecurity.dk	81
46	mx-02.mail-forwarder.io	81
47	email.webglobe.cz	80
48	email2.webglobe.cz	80
49	mailforward.dnsv.jp	79
50	email3.webglobe.cz	79

Show rows 51 – 1000

#	MX target	Domains
51	email4.webglobe.cz	79
52	mx3-dk.centerasecurity.dk	75
53	mx1.email-cluster.com	75
54	mx2.email-cluster.com	74
55	mx.aams4.jp	73
56	failover1.email-cluster.com	72
57	void.blackhole.mx	70
58	mx-0.aams4.jp	70
59	mx-1.aams4.jp	70
60	mail.global.frontbridge.com	70
61	mail.bluetie.com	69
62	posta.mediacenter.hu	69
63	posta2.mediacenter.hu	69
64	posta4.mediacenter.hu	69
65	posta5.mediacenter.hu	69
66	q01es.mail.s-web.de	69
67	q02es.mail.s-web.de	69
68	r01es.mail.s-web.de	69
69	r02es.mail.s-web.de	69
70	posta3.mediacenter.hu	68
71	gmail22.gadmail.de	68
72	gmail23.gadmail.de	68
73	wmail22.gadmail.de	68
74	mta.vshosting.eu	67
75	mxa.expediagroup.com	67
76	mxb.expediagroup.com	67
77	wmail23.gadmail.de	67
78	mx1.alwaysdata.com	66
79	mx2.alwaysdata.com	66
80	mx4.emailowl.com	65
81	mx.sendcloud.org	64
82	smtp.faisco.cn	64
83	mx01.statens-it.dk	64
84	mx02.statens-it.dk	64
85	mx03.statens-it.dk	64
86	mx04.statens-it.dk	64
87	mx05.statens-it.dk	64
88	mx06.statens-it.dk	64
89	mx07.statens-it.dk	64
90	mx08.statens-it.dk	64
91	rmail22.gadmail.de	64
92	rmail23.gadmail.de	64
93	mx5.emailowl.com	63
94	omail22.gadmail.de	63
95	omail23.gadmail.de	63
96	mx.spamfilter.io	62
97	mx6.emailowl.com	62
98	mx1.simplelogin.co	62
99	mx2.simplelogin.co	62
100	smtp-avas.seeweb.it	62
101	townsites.dnsmaster.net	62
102	mx4.nameshield.net	61
103	mx1.loading.es	61
104	mx2.loading.es	61
105	mx3.loading.es	61
106	mx1.oderland.com	59
107	mx2.oderland.com	59
108	antispam.tebilisim.com	59
109	mx01.muumuu-mail.com	59
110	mx1.daouoffice.com	59
111	mx.mymailwall.com	59
112	d01es.mail.s-web.de	59
113	d02es.mail.s-web.de	59
114	e01es.mail.s-web.de	59
115	e02es.mail.s-web.de	59
116	antispam.korea.kr	58
117	mxwcom.263xmail.com	57
118	mail.univalence.com	56
119	generalsmtp.disney.com	56
120	mxcom.263xmail.com	55
121	mx1.mythic-beasts.com	55
122	mx2.mythic-beasts.com	55
123	mx01.easyname.eu	55
124	mx02.easyname.eu	55
125	spamexpert01.host.bg	55
126	spamexpert02.host.bg	55
127	mx1.nepal.gov.np	55
128	mx3.oderland.com	54
129	mx4.oderland.com	54
130	mx20.active24.cz	54
131	mx2.nepal.gov.np	54
132	mx10.active24.cz	53
133	smtp-scan01.mx.reflected.net	53
134	mx1.mijndomein.nl	53
135	mx2.mijndomein.nl	53
136	c1.liara.email	52
137	mx01.cbsolt.net	52
138	mx02.cbsolt.net	52
139	mx1.netsolmail.net	52
140	mx2.daouoffice.com	52
141	mx01.glesys.se	52
142	p.webcom.ctmail.com	51
143	mx-1.mail.go.id	51
144	mx-2.mail.go.id	51
145	mx-3.mail.go.id	51
146	mx-4.mail.go.id	51
147	adresseavisen.in.tmes.trendmicro.eu	51
148	g01es.mail.s-web.de	51
149	g02es.mail.s-web.de	51
150	z01es.mail.s-web.de	51
151	z02es.mail.s-web.de	51
152	mx-mibc-fr-11.mailinblack.com	50
153	mx1.krystal.io	49
154	mx2.krystal.io	49
155	mail2.no-ip.com	49
156	relay.exohosting.sk	49
157	mail.twincdn.com	49
158	cloudmail01.clausweb.ro	48
159	cloudmail02.clausweb.ro	48
160	cloudmail03.clausweb.ro	48
161	cloudmail04.clausweb.ro	48
162	mail1.no-ip.com	48
163	mxc.global-mail.cn	48
164	mail.bayern.de	47
165	mx.otenet.gr	47
166	mx1.bund.de	47
167	mxu.global-mail.cn	47
168	mail.mailhub.work	46
169	mx02.glesys.se	46
170	mx2.bund.de	46
171	mx1.tigertech.net	45
172	mx2.tigertech.net	45
173	mx3.tigertech.net	45
174	mx-n.global-mail.cn	45
175	mgl.g-cloud.by	45
176	mx01.tophost.ch	45
177	relay3.dnsserver.eu	45
178	relay2.dnsserver.eu	45
179	mx1.pokingbear.com	45
180	a1.spambusters.email	45
181	n1.spambusters.email	45
182	mx2.otenet.gr	45
183	offline.iserv.eu	45
184	mail02.mail-gw.de	45
185	mail03.mail-gw.de	45
186	mail.gigaserver.cz	44
187	mxpool.de2.hostedoffice.ag	44
188	relay1.exohosting.sk	44
189	mx2.postmaster.hu	44
190	mx3.otenet.gr	44
191	mx4.otenet.gr	44
192	mail.idp365.net	44
193	mx01.routing.net	44
194	mx03.routing.net	44
195	mxs.ht-systems.ru	44
196	mail1.digikey.com	44
197	mail2.digikey.com	44
198	mail3.digikey.com	44
199	mx2.smtp.goog	43
200	mx3.smtp.goog	43
201	mx4.smtp.goog	43
202	y01es.mail.s-web.de	43
203	y02es.mail.s-web.de	43
204	mx02.tophost.ch	43
205	mx01.shopmania.biz	43
206	mx.stable.cz	43
207	mx02.routing.net	43
208	mars.intermailgate.com	43
209	mx1.smtp.goog	42
210	mx1.daemonmail.net	42
211	mx2.daemonmail.net	42
212	mail.valtori.fi	42
213	inbound.postmarkapp.com	42
214	mx01.ergonet.it	42
215	mx02.ergonet.it	42
216	mx03.ergonet.it	42
217	mx04.ergonet.it	42
218	mx2c51.megamailservers.eu	42
219	mx1.supremebox.com	41
220	mx2.supremebox.com	41
221	mx1.emailowl.com	41
222	ni-spamexperts.guzel.net.tr	41
223	semail.sandhills.com	41
224	wemail.sandhills.com	41
225	mx.easymail.ca	41
226	mx1.webhouse.sk	40
227	mx2.webhouse.sk	40
228	mx3.webhouse.sk	40
229	mx1.daringibex.com	40
230	mx.noris.net	40
231	mx2.us.opalstack.com	40
232	mx1.us.opalstack.com	40
233	smtp-in-internet-usr-m.gslb.srv.bnpparibas	40
234	webmail3.terrawan.eu	40
235	mail-in.fruugo.net	40
236	mx2.emailowl.com	39
237	mx3.emailowl.com	39
238	mx.soverin.net	39
239	mxmail.icoremail.net	39
240	mail1.correo.gob.es	39
241	mail2.correo.gob.es	39
242	mx.stable.sk	39
243	mx-mibc-fr-06.mailinblack.com	39
244	mx1-n.global-mail.cn	39
245	mx1.maileroo.com	38
246	mx.siteprotect.com	38
247	mx-10.au-east.atmailcloud.com	38
248	mx-20.au-east.atmailcloud.com	38
249	france.security-mail.net	38
250	europe.security-mail.net	38
251	mx1.friendfinder.com	38
252	mx2.friendfinder.com	38
253	mx3.friendfinder.com	38
254	mail.swisscom.com	38
255	mail10.swisscom.com	38
256	mail20.swisscom.com	38
257	mx.cstnet.cn	38
258	mail.techsurgeons.com	37
259	eu-esec-01.heimdalsecurity.com	37
260	eu-esec-02.heimdalsecurity.com	37
261	mx10.websupport.se	37
262	mail.variomedia.de	37
263	mx1.1984.is	36
264	mx2.maileroo.com	36
265	mx.zohocloud.ca	36
266	mxs.armgs.team	36
267	mx1.dnsmadeeasy.com	36
268	mx2.dnsmadeeasy.com	36
269	mxs.activeby.net	36
270	mx20.websupport.se	36
271	pri-jeemsg.eemsg.mail.mil	36
272	sec-jeemsg.eemsg.mail.mil	36
273	mx1.hostcreators.sk	36
274	mx2.hostcreators.sk	36
275	mx1.antispam-login.net	36
276	mx2.1984.is	35
277	mx100.ucozmail.com	35
278	fakemx.noris.net	35
279	mx.noris.de	35
280	mx.renr.es	35
281	mail2.careerjet.net	35
282	mail.nhs.uk	35
283	zc-mx.zohocorp.com	35
284	zc-mx2.zohocorp.com	35
285	zc-mx3.zohocorp.com	35
286	1-grid-mx02.com	34
287	1-grid-mx03.co.za	34
288	1-grid-mx01.co.za	34
289	mx0.fortion.net	34
290	mx2.zohocloud.ca	34
291	mx3.zohocloud.ca	34
292	mx3.dnsmadeeasy.com	34
293	assur.rtl.de	34
294	marduk.rtl.de	34
295	sul.rtl.de	34
296	sulis.rtl.de	34
297	mx.getcourse.ru	34
298	mx.buzondecorreo.com	34
299	smtp-avas-th.seeweb.it	34
300	gatekeeper.space.net	34
301	m103.server4u.cz	34
302	mx.ms.bi.zone	34
303	mx2.antispam-login.net	34
304	mailbox.wargaming.net	34
305	1-grid-mx04.com	33
306	mx.online.net	33
307	eu1-smtp-mx1.titanhq.com	33
308	mx1.mailer91.com	33
309	mail3.makeshop.jp	33
310	mx1.fortion.net	33
311	pmg.prodestek.com.tr	33
312	mxin1.airnet.ne.jp	33
313	mxin2.airnet.ne.jp	33
314	gatekeeper.spacenet.de	33
315	mx0002.neo.space	33
316	mx0001.neo.space	33
317	mail-8.mtpserver.net	33
318	mail-12.mtpserver.net	33
319	mail-13.mtpserver.net	33
320	mx-cache.online.net	32
321	mx2.mailer91.com	32
322	mx4.webhouse.sk	32
323	mx5.webhouse.sk	32
324	mx6.webhouse.sk	32
325	mx2.fortion.net	32
326	mx-mibc-fr-08.mailinblack.com	32
327	cnc.biz-email.net	32
328	mx1.mas.t-systems-service.com	32
329	mx1.nz.smxemail.com	32
330	mx01.agnat.pl	32
331	mforward.dtag.de	32
332	mail4.makeshop.jp	32
333	mxbackup.routing.net	32
334	mailin100.dcpserver.de	32
335	mail.makeup.com.ua	32
336	mx.x.recruit.co.jp	31
337	eu1-smtp-mx2.titanhq.com	31
338	mail.postale.io	31
339	mail.biz-email.net	31
340	mt-spamexperts.guzel.net.tr	31
341	mx2.mas.t-systems-service.com	31
342	mx3.mas.t-systems-service.com	31
343	mail.websitefa.com	31
344	mail73.conoha.ne.jp	31
345	mx-mibc-fr-07.mailinblack.com	31
346	mx1.alibaba-inc.com	31
347	email.cnhi.com	31
348	inbound01.dynata.com	31
349	inbound02.dynata.com	31
350	inbound03.dynata.com	31
351	aspmx1.dooray.com	31
352	us1-smtp-mx1.titanhq.com	31
353	mx01.ntc.net.pk	31
354	ntvirus.url.com.tw	30
355	ntvirus2.url.com.tw	30
356	mx2.nz.smxemail.com	30
357	mx1.heinlein-support.de	30
358	mx2.heinlein-support.de	30
359	mmx.mail.gov.az	30
360	mx.claramail.com.br	30
361	smtp.renault.fr	30
362	smtp2.renault.fr	30
363	a2.spambusters.email	30
364	mail.cmposta.com	30
365	mx0.mail7.freehost.com.ua	30
366	mx1.mail7.freehost.com.ua	30
367	mx2.mail7.freehost.com.ua	30
368	mail.mizbanfalocal.com	30
369	cloudscan24.ilger.com	30
370	mx10.vwgroup.com	30
371	us1-smtp-mx2.titanhq.com	30
372	alt2-mx.rackhostmx.com	30
373	mx1-mailcontrol.conova.com	30
374	mx2-mailcontrol.conova.com	30
375	mx3-mailcontrol.conova.com	30
376	mx4-mailcontrol.conova.com	30
377	mx1.dandomain.dk	30
378	mail-relay.wetteronline.de	30
379	dmeas13.imail.scig.gov.hk	30
380	dmeas14.imail.scig.gov.hk	30
381	pmeas13.imail.scig.gov.hk	30
382	pmeas14.imail.scig.gov.hk	30
383	us1.workspace.org	29
384	mx.fimn.net	29
385	mmxs.majordomo.ru	29
386	mx01.espmailservice.net	29
387	mx-waw.grupawp.pl	29
388	mx-gda.grupawp.pl	29
389	mx.truemail.it	29
390	tarbaby.junkemailfilter.com	29
391	inmx.rambler-co.ru	29
392	mx.mailo.com	29
393	mx.serveriai.lt	29
394	mail.joker.com	29
395	mail2.filteredmx.net	29
396	mx2.mailhop.org	29
397	mx2.dandomain.dk	29
398	mail.cm.telia.net	29
399	wmx.ecounterp.com	28
400	mx-mibc-fr-10.mailinblack.com	28
401	ssl.emailserver.vn	28
402	work-mx.app.hey.com	28
403	a.mx.mayfirst.org	28
404	b.mx.mayfirst.org	28
405	c.mx.mayfirst.org	28
406	email.imcloud.org	28
407	mx.zoho.jp	28
408	mx2.zoho.jp	28
409	mx3.zoho.jp	28
410	mx3.heinlein-support.de	28
411	mgf.cybermail.jp	28
412	smtp1.lerelaisinternet.com	28
413	smtp2.lerelaisinternet.com	28
414	mx1.dfw.automattic.com	28
415	mx2.ams.automattic.com	28
416	mx3.34sp.com	28
417	mx-ha.emailemnuvem.com.br	28
418	mx1.ravingchamois.com	28
419	mail1.filteredmx.net	28
420	mail3.filteredmx.net	28
421	fallback.axc.eu	28
422	mxpool.hostedoffice.ag	28
423	mx1c51.megamailservers.com	28
424	cloudscan25.ilger.com	28
425	mail.voxops.net	28
426	sgrmgw5.swatchgroup.com	28
427	sgrmgw6.swatchgroup.com	28
428	sgc.hsplus.email	28
429	mail.svethostingu.cz	28
430	smtp.dvtech.io	28
431	mx2.spamfiltering.com	28
432	mx.viettelidc.com.vn	27
433	mail-s30.1gb.ru	27
434	mx1.gigahost.dk	27
435	mx2.gigahost.dk	27
436	mx3.gigahost.dk	27
437	securemail-mx1.synaq.com	27
438	eagle.mxlogin.com	27
439	mx4.34sp.com	27
440	mx-dor.bell.ca	27
441	mx-wyn.bell.ca	27
442	mail-pt.securemail.pro	27
443	smtp.sarenet.es	27
444	reply.s12.exacttarget.com	27
445	mailgw.nic.in	27
446	mx02.emailpnl.com	27
447	mx3c51.megamailservers.com	27
448	mxs.t-mail.io	27
449	mailgw3.oneoffice.jp	27
450	rmx.mailgw.jp	27
451	mx-mibc-fr-05.mailinblack.com	27
452	mx03.puc.rediris.es	27
453	mx04.puc.rediris.es	27
454	mx1.paypalcorp.com	27
455	mx1.spamfiltering.com	27
456	mx2.pokerstars.com	27
457	apache.mk.ru	27
458	mx0162.ppsmtp.com	27
459	mx0162.ppsmtp.de	27
460	corpmx.yelpcorp.com	27
461	mx.inbox.eu	26
462	smx2.web-hosting.com	26
463	mx1.mail-scanner.eu	26
464	mx1.efwd.spaceship.net	26
465	mx2.efwd.spaceship.net	26
466	securemail-mx2.synaq.com	26
467	mx1.krystal.co.uk	26
468	mail1.ethionet.et	26
469	mail2.ethionet.et	26
470	mail3.ethionet.et	26
471	mail4.ethionet.et	26
472	bounce.argewebhosting.nl	26
473	mxus1.alibaba-inc.com	26
474	inbound.mail.naiadsystems.com	26
475	mail.mystoredns.com	26
476	mx01.emailpnl.com	26
477	mx01.rto.de	26
478	mxs.tbank.ru	26
479	mx1.fiercebadger.com	26
480	mx2.paypalcorp.com	26
481	mx.shopmania.net	26
482	mailasp.sovcombank.ru	26
483	serwer1429664.home.pl	26
484	mx.eivoittoa.fi	26
485	smtp-in0.prod0.webspace.bz	25
486	smtp-in1.prod0.webspace.bz	25
487	smx3.web-hosting.com	25
488	parkingmaster1.kv.de	25
489	mx2.mail-scanner.eu	25
490	mx1.alastyr.com	25
491	sns.nethost.sk	25
492	mx2.krystal.co.uk	25
493	mail.mailnode.cc	25
494	mgk.cybermail.jp	25
495	mg.cybermail.jp	25
496	mail.ssonet.nl	25
497	mail2.ssonet.nl	25
498	gw-spam.mailwood.com	25
499	eagle-relay.mxlogin.com	25
500	smtp1-inki.e-i.net	25
501	smtp1-insi.e-i.net	25
502	mx1.stsmail.ro	25
503	mx2.stsmail.ro	25
504	mx01.mi.com.co	25
505	mx1.savana.cz	25
506	mx2.savana.cz	25
507	pmx.megacp.com	25
508	bmx.megacp.com	25
509	mx.turktelekomeposta.com	25
510	mail2.mystoredns.com	25
511	mgp.cybermail.jp	25
512	mx-in.kommunale.it	25
513	mx1.earfulwolf.com	25
514	mxbackup.wnpower.com	25
515	mx1.mijn.host	25
516	mx2.mijn.host	25
517	mx1.motosnap.com	25
518	mx2.motosnap.com	25
519	ign-mx1.webglobe.com	25
520	ign-mx2.webglobe.com	25
521	cr1.cylex.de	25
522	extern-gateway.innogames.de	25
523	mx3.hh.ru	25
524	mx001.fatsecret.com	25
525	mail.mojehobby.pl	25
526	my-mx.email-protect.gosecure.net	24
527	aspmx.whoisworks.com	24
528	fallbackmx.spamservice.nl	24
529	lastmx.spamservice.nl	24
530	mx-a.secumail.de	24
531	mx-b.secumail.de	24
532	mx2.alastyr.com	24
533	mail01.be2.com	24
534	mx-1.pobox.com	24
535	mx-2.pobox.com	24
536	mx-3.pobox.com	24
537	mailscanner01.zoner.fi	24
538	mailscanner02.zoner.fi	24
539	mx-mibc-fr-09.mailinblack.com	24
540	mx-aol.mail.gm0.yahoodns.net	24
541	mx6.eganet.go.tz	24
542	smx.megacp.com	24
543	mx1.trustytapir.com	24
544	mxf.eu.mpssec.net	24
545	mxg.eu.mpssec.net	24
546	mx1.onlinemail.io	24
547	mx2.onlinemail.io	24
548	parse.mailjet.com	24
549	smtp1.osuosl.org	24
550	smtp2.osuosl.org	24
551	smtp3.osuosl.org	24
552	smtp4.osuosl.org	24
553	gateway.aos.rw	24
554	mx6.hh.ru	24
555	smx1.web-hosting.com	23
556	mail.lima-city.de	23
557	mx.spamservice.nl	23
558	mail.hostalo.it	23
559	mgc.cybermail.jp	23
560	b1234.mx.srv.dfn.de	23
561	c1234.mx.srv.dfn.de	23
562	captmx-re20.bizflycloud.vn	23
563	captmx-re30.bizflycloud.vn	23
564	captmx-re40.bizflycloud.vn	23
565	m213-mail.server4u.cz	23
566	vip-mail.superhosting.cz	23
567	s2vg300mr01.pzd-svn.de	23
568	s2vg300mr02.pzd-svn.de	23
569	mail.system.digitalartscloud.com	23
570	mx01.hosting.de	23
571	mx02.hosting.de	23
572	mx03.hosting.de	23
573	mxbackup.hosting.de	23
574	mxbackup1.svrsh.com	23
575	mail-in3.rian.ru	23
576	mail-in4.rian.ru	23
577	pochta.mtw.ru	23
578	cm2.99sync.com	23
579	mx01.goneo.de	23
580	mx02.goneo.de	23
581	smartmail1.fednet.gov.ae	23
582	smartmail2.fednet.gov.ae	23
583	mail.101domain.com	23
584	mx1.niagahoster.co.id	23
585	mx2.niagahoster.co.id	23
586	ign-mx3.webglobe.com	23
587	ign-mx4.webglobe.com	23
588	mx1.suremail.cn	23
589	mx2.suremail.cn	23
590	mx3.suremail.cn	23
591	mx4.suremail.cn	23
592	spam.seoul.go.kr	23
593	spam2.seoul.go.kr	23
594	mx.vps1.8com.cz	23
595	mx1.chengmail.cn	22
596	mx2.chengmail.cn	22
597	alf1.aspmx.whoisworks.com	22
598	alf2.aspmx.whoisworks.com	22
599	accor.in.tmes.trendmicro.eu	22
600	ksmg01.picompany.ru	22
601	ksmg02.picompany.ru	22
602	mx01a.pp-tp.com	22
603	mx02a.pp-tp.com	22
604	mx.c2.icoremail.net	22
605	mx.skok.cz	22
606	mxbackup.skok.cz	22
607	rk2.comju.de	22
608	mx.sina.net	22
609	mx2.lite-host.su	22
610	gwmail.ktbizoffice.com	22
611	mfwd.ebrandservices.com	22
612	a1234.mx.srv.dfn.de	22
613	ezsmtp.bizmeka.com	22
614	mx1.email-hosting.net.au	22
615	mx2.email-hosting.net.au	22
616	mx3.email-hosting.net.au	22
617	mx4.email-hosting.net.au	22
618	my.mailbux.com	22
619	mx1.spatiul.ro	22
620	mx2.spatiul.ro	22
621	mx3.spatiul.ro	22
622	mx4.spatiul.ro	22
623	allegro.in.tmes.trendmicro.eu	22
624	mx.turkticaret.net	22
625	mx.ingaia.com.br	22
626	mxbackup2.svrsh.com	22
627	mx1.mailhop.us	22
628	mx4.eganet.go.tz	22
629	mx20.vwgroup.com	22
630	mail.med-vergleich.com	22
631	mta.hosts.net.nz	22
632	mg1.g-cloud.by	22
633	mx01.earthlink-vadesecure.net	22
634	mx02.earthlink-vadesecure.net	22
635	mx03.earthlink-vadesecure.net	22
636	mx04.earthlink-vadesecure.net	22
637	aws-useast1-mail.mars-inc.com	22
638	mail.framasoft.org	22
639	mail.advameg.com	22
640	sv62.ifastnet11.org	21
641	mx.spamorez.ru	21
642	mx1.vevida.com	21
643	mx2.vevida.com	21
644	mx3.vevida.com	21
645	mx01b.pp-tp.com	21
646	mx02b.pp-tp.com	21
647	mx1.de.opalstack.com	21
648	mx2.de.opalstack.com	21
649	mail.forumhome.com	21
650	hzmx01.xmail.ntesmail.com	21
651	alt1.mymailcheap.com	21
652	mail01.phoenixgroup.eu	21
653	mail02.phoenixgroup.eu	21
654	mail03.phoenixgroup.eu	21
655	mail04.phoenixgroup.eu	21
656	dmeas11.imail.scig.gov.hk	21
657	dmeas12.imail.scig.gov.hk	21
658	pmeas11.imail.scig.gov.hk	21
659	pmeas12.imail.scig.gov.hk	21
660	in.widestore.net	21
661	mail1.rit.ee	21
662	mail3.rit.ee	21
663	mx1.reg365.net	21
664	mx2.reg365.net	21
665	mx01.govmail.gov.jo	21
666	mx02.govmail.gov.jo	21
667	mail.anonaddy.me	21
668	friday.mxlogin.com	21
669	ge-smtp01.gammae.com	21
670	mx01.windstream.net	21
671	mail.mycylex.de	21
672	mtab.intel.com	21
673	mx-in-1.webreus.nl	20
674	mx-in-2.webreus.nl	20
675	mxfallback.spamfilterserver.com	20
676	mxbackup1.junkemailfilter.com	20
677	mx4.vevida.com	20
678	backup-mx.vevida.com	20
679	rx1.sparkpostmail.com	20
680	rx2.sparkpostmail.com	20
681	rx3.sparkpostmail.com	20
682	mail-in.protection.bpce-it.fr	20
683	mx.portsit.net	20
684	mx.portsit.se	20
685	mx.portsit.com	20
686	mx4.funlife.cz	20
687	hzmx02.xmail.ntesmail.com	20
688	alt2.mymailcheap.com	20
689	mgw.gov.kz	20
690	mx1.a1.net	20
691	mx1.em.dingtalk.com	20
692	mx2.em.dingtalk.com	20
693	mail.mosby.com	20
694	mailin-01.mx.sonic.net	20
695	mailin-02.mx.sonic.net	20
696	mail.cco.in.ua	20
697	mx.fusemail.net	20
698	mail2.anonaddy.me	20
699	mx1.mailhop.co	20
700	mx1.mailhop.co.uk	20
701	fortispam.cedia.org.ec	20
702	emix.sdv.fr	20
703	ag1.cesnet.cz	20
704	ag2.cesnet.cz	20
705	mx20.profesionalhosting.com	20
706	postrelay1.lrz.de	20
707	postrelay2.lrz.de	20
708	mx.junkemailfilter.net	20
709	mx.junkemailfilter.org	20
710	mx4c51.megamailservers.eu	20
711	mx1.progreso.pl	20
712	mx2.progreso.pl	20
713	mx3.progreso.pl	20
714	mx1.belwue.de	20
715	aspmx1.gov-dooray.com	20
716	mx.hitcluster.com	20
717	mail.tehila.gov.il	20
718	mx.dka.mailcore.net	20
719	mx1.smashtic.com	20
720	mx-mibc-fr-03.mailinblack.com	20
721	rcmx3.roscongress.org	20
722	mx.vk.com	20
723	parking13.kv.de	19
724	mx10.omc.net	19
725	mx76.antispam-post.ru	19
726	mail1.qlc.co.in	19
727	mail2.qlc.co.in	19
728	mail3.qlc.co.in	19
729	mx-4.pobox.com	19
730	mx-5.pobox.com	19
731	mx1.greenhost.nl	19
732	mx2.greenhost.nl	19
733	mailx.hoster.ru	19
734	mail.academiadasapostas.com	19
735	reply.s50.exacttarget.com	19
736	mx3.mailinghosting.com	19
737	smtp.tmgrup.com.tr	19
738	blackhole.aftermarket.pl	19
739	avas.cloudemail.be	19
740	mailas02.clog.jp	19
741	mail2.greennet.org.uk	19
742	mx1.hostingcorreo.com	19
743	mx2.hostingcorreo.com	19
744	mx3.hostingcorreo.com	19
745	mx4.hostingcorreo.com	19
746	mx.ukrdomen.com	19
747	mx2.uh.com.ua	19
748	lobo.mercurio.cl	19
749	mx01.ofis.net	19
750	mx10.profesionalhosting.com	19
751	mailmx0001.rlp.de	19
752	mailmx0002.rlp.de	19
753	mailscanner.powerhosting.dk	19
754	mxh.eu.mpssec.net	19
755	mxi.eu.mpssec.net	19
756	mail-relay-1.nethost.cz	19
757	fimad.interieur.gouv.fr	19
758	smtp.egcloud.gov.eg	19
759	mail2.p24.hu	19
760	mail.lakennetwork.com	19
761	smtp.sparkpostmail.com	19
762	mta.1stdomains.net.nz	19
763	selmx5.roscongress.org	19
764	mx3.eganet.go.tz	19
765	mx.kpnmail.nl	18
766	parking1.kv.de	18
767	filter.premiumantispam.nl	18
768	fallback.premiumantispam.nl	18
769	webmail.mail.maxns.net	18
770	mx1.redhat.com	18
771	mx11.omcnet.de	18
772	mail.endora.cz	18
773	mx1.nethely.hu	18
774	mx2.nethely.hu	18
775	mx32.antispam-post.ru	18
776	mxacloud02.imatrix.co.jp	18
777	us4-smtp-mx1.titanhq.com	18
778	us4-smtp-mx2.titanhq.com	18
779	mail-de.maxcluster.net	18
780	pmg.guzel.net.tr	18
781	pmg2.guzel.net.tr	18
782	mx1.spamtador.com	18
783	mx2.spamtador.com	18
784	mx3.spamtador.com	18
785	ch-mail-fx-001.funix.nl	18
786	of-mail-fx-001.funix.nl	18
787	mx3.em.dingtalk.com	18
788	mr.pavietnam.vn	18
789	mx.noip.com	18
790	mail.mbcore.io	18
791	mx0.spamfilter.gr	18
792	mx1.spamfilter.gr	18
793	fm.telconet.net	18
794	mailf.comsats.net.pk	18
795	mx3.daouoffice.com	18
796	avas-backup.cloudemail.be	18
797	reply.s13.exacttarget.com	18
798	mdn.corp-email.cn	18
799	mailforward.lcn.com	18
800	mailgw2.spd.co.il	18
801	mx1.antispam-post.ru	18
802	bmail.zaglush.nodacdn.net	18
803	mxc.meoempresas.pt	18
804	mxp.meoempresas.pt	18
805	inbound.registeredsite.com	18
806	mx-stp.mail.saunalahti.fi	18
807	mx-tnl.mail.saunalahti.fi	18
808	mail.schroederdennis.de	18
809	mx.c1.icoremail.net	18
810	mx0.mailinblack.com	18
811	mx1.gov.lk	18
812	mx.xmission.com	18
813	smtp-gate.gn.apc.org	18
814	gcmx01.govkorea.kr	18
815	gcmx02.govkorea.kr	18
816	gcmx03.govkorea.kr	18
817	mx-in04.natrohost.com	18
818	mx-in04b.natrohost.com	18
819	mx.usa.net	18
820	mail.reed.jp	18
821	mx02.ofis.net	18
822	mx.junkemailfilter.com	18
823	backup-mx.powerhosting.dk	18
824	friday-relay.mxlogin.com	18
825	mail.net4india.com	18
826	mxprimary.spamfilterserver.com	18
827	mx1.jimdo.com	18
828	mx2.jimdo.com	18
829	mx4.belwue.de	18
830	backup.mail.profiwh.com	18
831	mgy.cybermail.jp	18
832	mta5.am0.yahoodns.net	18
833	mta6.am0.yahoodns.net	18
834	mta7.am0.yahoodns.net	18
835	mx.ilait.se	18
836	mx2.freeola.com	18
837	mx3.freeola.com	18
838	mx4.freeola.com	18
839	mx5.freeola.com	18
840	mail.dyson.cloud	18
841	mx1.ex.360.cn	17
842	mx1.mschosting.com	17
843	mx2.mschosting.com	17
844	mx1.sparkspace.huaweicloud.com	17
845	mx2.sparkspace.huaweicloud.com	17
846	mx01.263xmail.com	17
847	mailfilter.hibox.biz	17
848	smtp.webnames.ca	17
849	antispam04.pensomail.com.br	17
850	eu1.workspace.org	17
851	mail.sidecloud.cc	17
852	mailin2.mx.speedkom.net	17
853	mailin5.mx.speedkom.net	17
854	mx11-new.vatican.va	17
855	mx12-new.vatican.va	17
856	mx20.vatican.va	17
857	mx21.vatican.va	17
858	mx.inbound.elasticemail.com	17
859	mx01.logixmx.com	17
860	mx02.logixmx.com	17
861	mx-in03b.natrohost.com	17
862	mx.bpn.ge	17
863	smtp01.wmaker.net	17
864	smtp02.wmaker.net	17
865	mdn.corpemail.net	17
866	mx3.deem.sa	17
867	mx4.deem.sa	17
868	mail.cleanmail.eu	17
869	mx1.monarobase.net	17
870	mx2.monarobase.net	17
871	mia1-load.supramail.com.br	17
872	srv1.flexfilter.nl	17
873	srv2.flexfilter.nl	17
874	mx.inet.vn	17
875	mail18.lh.pl	17
876	mx-in-hfd.apple.com	17
877	mx-in-vib.apple.com	17
878	mx1.mailhop.org	17
879	mx2.gov.lk	17
880	security.mailcloud.com.tw	17
881	mxbjm.chinaemail.cn	17
882	mail.casinocontroller.com	17
883	mxbackup01.ofis.net	17
884	mailmx0003.rlp.de	17
885	mailmx0004.rlp.de	17
886	relay.mail.sec-provider.de	17
887	mail.amamultimedia.com	17
888	mx02.mail.alibaba.com	17
889	mx2.belwue.de	17
890	mx3.belwue.de	17
891	smtp-relay.corpex-net.de	17
892	mailgw.mts.rs	17
893	mx1.promail.com.tr	17
894	mx2.promail.com.tr	17
895	mailforward.iomart.com	17
896	mx1.megamailservers.com	17
897	antispam.profiwh.com	17
898	pop2.ocnk.net	17
899	mail03.gov.cy	17
900	inbound-reply.s1.exacttarget.com	17
901	mail2535230.us.to	17
902	mail.atw.hu	17
903	mail2.atw.hu	17
904	mail.lottery.ltd.uk	17
905	rtmx2.roscongress.org	17
906	mail.myonlineradio.hu	17
907	mx-in1001.wikimedia.org	17
908	mx-in2001.wikimedia.org	17
909	dns10977.phdns5.es	17
910	mail.bizboxa.com	16
911	mx1.spamorez.ru	16
912	mxs.hoster.ru	16
913	mx-vh.clara.net	16
914	mxbackup2.junkemailfilter.com	16
915	smtp1.mafra.cz	16
916	smtp2.mafra.cz	16
917	smtp3.mafra.cz	16
918	smtp4.mafra.cz	16
919	mx.latnet.lv	16
920	mx2.latnet.lv	16
921	mail.messaging.microsoft.com	16
922	parking5.kv.de	16
923	parking4.kv.de	16
924	mail.in.creolineserver.de	16
925	mail1.bravehost.com	16
926	mail2.bravehost.com	16
927	primary.us.etp.fireeyegov.com	16
928	alt1.us.etp.fireeyegov.com	16
929	mx1.wedos.email	16
930	mx.mijnspamfilter.nl	16
931	mx-in03.natrohost.com	16
932	mx1.cloudaccess.net	16
933	mx2.cloudaccess.net	16
934	mail2.motorpresse.de	16
935	gbext.gn.gov.ie	16
936	mx10.jdm.pl	16
937	mx20.jdm.pl	16
938	mx03.mi.com.co	16
939	mx1.zoner.fi	16
940	mx2.zoner.fi	16
941	cdn.corpemail.net	16
942	mx-in02.natrohost.com	16
943	mx-in02b.natrohost.com	16
944	mx2.bgdns.net	16
945	lae-mx2.daybreakgames.com	16
946	mx-avas.mvmnet.com	16
947	mx.yourpaysitepartner.com	16
948	mx1.secure.ly	16
949	reply.s10.exacttarget.com	16
950	mx.nameweb.biz	16
951	mx10.onebit.cz	16
952	mx10.onebit.eu	16
953	mx.c3.icoremail.net	16
954	mx2.c3.icoremail.net	16
955	mx2.securitynet.cz	16
956	mx-in.g.apple.com	16
957	mx-in-mdn.apple.com	16
958	mx.mailbox.orange-business.com	16
959	smtp1.speednames.com	16
960	mx22.gmoserver.jp	16
961	mxa.api-mail.com	16
962	mxb.api-mail.com	16
963	mail2.casinocontroller.com	16
964	security2.mailcloud.com.tw	16
965	mx.generic-isp.com	16
966	mx3.netregistry.net	16
967	mx2.netregistry.net	16
968	spamguard1.mxserver.ro	16
969	spamguard2.mxserver.ro	16
970	ofcsgbbm.gbbmvi-wan.de	16
971	zbcsgbbm.gbbmvi-wan.de	16
972	mail2.rollernet.us	16
973	smtp2.speednames.com	16
974	mail-cc.maxcluster.net	16
975	mail.ksomail.com	16
976	mx02.dioezesennetz.de	16
977	mx01.dioezesennetz.de	16
978	mx01.mail.alibaba.com	16
979	dhl-com.fortimailcloud.com	16
980	clustera.ignite.co.uk	16
981	clusterb.ignite.co.uk	16
982	a.mx.domainoo.fr	16
983	mx2.megamailservers.com	16
984	mx3.megamailservers.com	16
985	m4.xrea.com	16
986	srv03mailgw.dimdi.de	16
987	srv04mailgw.dimdi.de	16
988	antispamawn.thaicloudsolutions.com	16
989	newsletter.cylex.de	16
990	spamgw.blueweb.co.kr	16
991	mx03.mvnet.de	16
992	mx04.mvnet.de	16
993	ksmg.mail.rwb.ru	16
994	uk1-smtp-mx1.titanhq.com	16
995	uk1-smtp-mx2.titanhq.com	16
996	sp000.m.atw.hu	16
997	sp001.m.atw.hu	16
998	mail.fotokoch.de	16
999	mail2.fotokoch.de	16
1000	mail2.louis.de	16

100 curiosities — singleton hostnames

Hostnames that appear exactly once in the Tranco top-1M (count == 1), sorted by length descending. These are the most bespoke / unusual setups — long custom names, region-specific hosters, one-off corporate gateways. Useful for qualitative research.

#	MX target (rare singleton)
1	nomcom-postfixnlb-primary-prd-9b67717506e5a5b8.elb.ap-northeast-1.amazonaws.com
2	port-arthur-historic-site-management-authority-mx1.firstcloudsecurity.net
3	port-arthur-historic-site-management-authority-mx2.firstcloudsecurity.net
4	cubic-transportation-systems-australia-mx2.firstcloudsecurity.net
5	cubic-transportation-systems-australia-mx1.firstcloudsecurity.net
6	kumomta-inbound-nlb-a0dcfe14e184840a.elb.us-east-2.amazonaws.com
7	mx.sendsimplepainting-com01e.mail.protection.outlook.comgrid.net
8	c376242079468b63f23f69becab45ae05b58a20e3873f77f83b2288f3647007
9	realf-applb-vrxtwmiuyvuv-2103991361.us-west-1.elb.amazonaws.com
10	google-site-verification=ca3yqrdl5fgkylibg1wxi3ohafhe0tonkbvpzb
11	nlg-nhs-uk.mail.protection.outlook.com.disabled-dangler-101225
12	ww-mail-nlb-047466db50446f62.elb.ap-northeast-1.amazonaws.com
13	manak-waste-management-private-ltd-mx2.firstcloudsecurity.net
14	manak-waste-management-private-ltd-mx1.firstcloudsecurity.net
15	remai-art-gallery-of-saskatchewan-mx2.firstcloudsecurity.net
16	55mth-mail-26b47d887ec242c7.elb.ap-northeast-1.amazonaws.com
17	remai-art-gallery-of-saskatchewan-mx1.firstcloudsecurity.net
18	emailserver-2e1b0065310ca62b.elb.ca-central-1.amazonaws.com
19	p3plzcpnl502916.prod.phx3.secureserver.net.eco-reglalos.com
20	mx1.123-regmmailsec.protonmail.chailsec.protonmail.ch.co.uk
21	scprd2-p1-aadd52a9a99424fb.elb.ap-northeast-1.amazonaws.com
22	df-nu4a-g8rhv-jl689-g9c89-ruukm-t7dhr.in.tmes.trendmicro.eu
23	skeletal-triceratops-g8ku8ehowd09a0s8ppapxcdf.herokudns.com
24	_dc-mx.fc2dea773184.medicalteaching.org.cdn.cloudflare.net
25	8ad2f72d-b2c4-4426-93fd-baacf7213b2d.in.tmes.trendmicro.eu

Show rows 26 – 100

#	MX target (rare singleton)
26	knowbe4-site-verification=34b9a58212e47bbcdf835890f6facdda
27	manulifesinochem-com02b.mail.protection.partner.outlook.cn
28	europeanchamber-com-cn.mail.protection.partner.outlook.cn
29	gooschool-2015-715987208.ap-northeast-1.elb.amazonaws.com
30	lb-sensproxy-2213375-dc68d533ade4.kr-gov.lb.naverncp.com
31	neusoftmedical-com01i.mail.protection.partner.outlook.cn
32	audifawnev-com-cn01bb.mail.protection.partner.outlook.cn
33	nfi34bdspmurbud57axm3w3xj2oyegddbnn6576ooea2jqnvu2mq.mx-
34	canaancreative-com01e.mail.protection.partner.outlook.cn
35	printondemand-worldwide.com.pri-mx.uk0101.smtproutes.com
36	u003d1a3b487390464833982a65fae59682b8.pamx1.hotmail.com
37	ec2-54-250-119-230.ap-northeast-1.compute.amazonaws.com
38	sheltered-wildebeest-nw4f5n6yfgkz10hjq0e2b03r.herokudns
39	nospamcloudserver.germanywestcentral.cloudapp.azure.com
40	porschepreview-cn01i.mail.protection.partner.outlook.cn
41	etpr3nvk46n27vcc4juimkc7lxqosohb2zurr75mhylme5ye3awa.mx
42	ec2-54-249-67-111.ap-northeast-1.compute.amazonaws.com
43	zhengduindustry-com.mail.protection.partner.outlook.cn
44	ec2-54-249-53-219.ap-northeast-1.compute.amazonaws.com
45	ec2-54-249-80-136.ap-northeast-1.compute.amazonaws.com
46	ipolaristech-com02b.mail.protection.partner.outlook.cn
47	90567ad2edb4ac9680d76a5d4492522415dc356e.msv1.invalid
48	voipdnsservers-com.mail.protection.outlook.comook.com
49	b9b6ae914169a5a1688b1ae10978544884baaeb2.msv1.invalid
50	8128664d7b9f7560c069c1bc8e6e2288e53721dc.msv1.invalid
51	be7c5e09a4d9047e88c98c8bdd5c0306855692b8.msv1.invalid
52	f59062e299f55da9447ced93e0ca43a2524e3386.msv1.invalid
53	e1373a12bca10839245327b9929bbbb41f14a8b3.msv1.invalid
54	st-leonards-medical-clinic-mx2.firstcloudsecurity.net
55	st-leonards-medical-clinic-mx1.firstcloudsecurity.net
56	0fcc78af48b44f7236938cb34abbc42e37e614bf.msv1.invalid
57	e57689ebf1cee2dcc74ca9695ba1a35f5249a903.msv1.invalid
58	printondemand-worldwide.com.bak-mx.uk0101.smtpbak.com
59	mailserver-elb-2061444691.us-east-1.elb.amazonaws.com
60	398fee270f77f506c1cc48e3a278690a231969e0.msv1.invalid
61	5630e8ec42dcf18d9f086f6c16eb2667db34ace6.msv1.invalid
62	dd65647d11fb1053fa50107650b42fc91a436e09.msv1.invalid
63	b7d2174f2e1b3ef1065ffa8a05f24e3ca87487e4.msv1.invalid
64	261fab891c9e30b9a8437b2307e7e67ebbfeee85.msv1.invalid
65	4b21ca12bd08ff22911a3537cf16967c602f815c.msv1.invalid
66	7a1b696a13d31b9dd635db9c58d1f1c23c2c8288.msv1.invalid
67	23a61b54849a99e548624c09d1cdddef7ffb2764.msv1.invalid
68	mercedesbenz-cn02b.mail.protection.partner.outlook.cn
69	638d21520d5d8632ca41f2350704980f00eee5ee.msv1.invalid
70	8fca991f22bf0d3d9888adf9a9f177956ff29643.msv1.invalid
71	f78862464ed0b6cbe472a0576b0fbb2ac6d05878.msv1.invalid
72	64e72857b06d310c34fb9bc4c83301e58346dda5.msv1.invalid
73	d8ef932105e6cdcd8d95d568e0ceb61e012b76b4.msv1.invalid
74	7d647202e4a762b842051e7ec60ff2fbd7fa2867.msv1.invalid
75	2a3139bde0fa73af719ed58cd4bc476dab5a81cc.msv1.invalid
76	0e52eafae7d1afa59efc92fe1a4ff3276f8eed08.msv1.invalid
77	86da5df266ee85ba1c9b2e19f890526f1191355e.msv1.invalid
78	c7d3d7276f30dc72efbeb8e54423b1b47f63c58c.msv1.invalid
79	b0ffb392998bbac22514f47efc669d776443e592.msv1.invalid
80	52f27914d6785f1569d999124b030c5d757f88dc.msv1.invalid
81	explorationpub-com.mail.protection.partner.outlook.cn
82	a65de67cec3cffe17a5ac1f81aa42b22b2bcc8bb.msv1.invalid
83	d3289eaaa594de2bf98e995630fdf76eb646bd67.msv1.invalid
84	c37b41cc2aa83c50b8571a4fc41db855c664ecb8.msv1.invalid
85	279c75a743b1712505623de1926da99446f03967.msv1.invalid
86	b894a10f9d664f0b272df24349d0136fba05a89b.msv1.invalid
87	7312c3dbeed587e1ca48d18b0132c7c7d3d449d0.msv1.invalid
88	7544859033090d52a1be915fe96b1ec34f4dfd58.msv1.invalid
89	outdoormaster-com.mail.protection.partner.outlook.cn
90	t2hbn3v62hu8w3s5.nx7lu0xvfrcp3ikg.pki-validation.com
91	porschepcn-com01i.mail.protection.partner.outlook.cn
92	5c7am4rrhs7xh7sgmu74qjaqd4phx2qifzbv6jl3i3xz3zhjqqqq
93	f32ulet7jexwiwmrwipot2hs332uejyx5q5nwf3ggp77wer7utca
94	jqtyfzs58md1ra71.dbb7owi5iazdyuvq.pki-validation.com
95	ec2-54-249-8-39.ap-northeast-1.compute.amazonaws.com
96	3osdx5cysr5ezqynjk3rxbwfxkoqwt47ek32cdcy7uar65mfindq
97	\234\176\149\235\130\168\235\167\155\236\167\145.net
98	3aas5bdlzoabws5g7mber6wtuyuvqjldemho2xwpx2pjf36yejoa
99	gdsservices-com0i.mail.protection.partner.outlook.cn
100	mfbwxutmypci.mail-manager-smtp.ap-southeast-2.on.aws

TLD breakdown of Unknown bucket

Where the unmatched domains live, by registry suffix. Two-level TLDs like co.uk and com.br are recognised.

#	TLD	Domains in Unknown bucket
1	com	22 808
2	de	5 809
3	net	4 652
4	ru	3 557
5	org	2 883
6	pl	1 990
7	jp	1 532
8	it	1 490
9	fr	1 435
10	cz	1 420
11	nl	1 208
12	co.uk	1 207
13	com.br	889
14	eu	878
15	cfd	826

Methodology in 30 seconds

Source: daily OpenINTEL Tranco snapshot (forward DNS, top-1M).
"Unknown / Generic": domains whose primary MX hostname does not match any entry in dictionaries/mx_providers.py (named providers) or generic mail.* / mx*.* patterns we attribute to "Generic / Self-hosted".
Self-hosted: the primary MX equals the apex domain or is a subdomain of it (example.com → mx.example.com).
Curiosities: hostnames with exactly one observation in the snapshot, sorted by length descending. Deterministic — same snapshot ⇒ same list.
Reproducibility: all CSVs are downloadable verbatim. No proprietary enrichment.

Generated automatically from OpenINTEL Tranco snapshot 2026-09-24. Aggregates only — raw data is deleted after analysis per the OpenINTEL data agreement.