Unmatched MX targets top 100

According to Live Direct Marketing's daily Tranco top-1M scan (September 22, 2026), these are the 100 most frequent MX target hostnames that our dictionary does not yet attribute to a named mailbox provider. They are the raw material for improving provider detection — and a window into niche and regional email hosts.

Key facts

100 most-common unmatched MX hostnames, ranked by domain count.
Unmatched = not yet mapped to a named provider in our open classification dictionary.
Snapshot 2026-09-22; the list shifts as the dictionary improves.
Spot your own infrastructure here? Tell us at support@live-direct-marketing.online.

Provider detection is only ever as good as its dictionary. An MX target is unmatched when it appears often enough to matter but does not fit any known provider pattern — usually a smaller hosting company, a regional mail platform, or a service that has grown popular faster than the classifiers tracking it.

We publish the unmatched leaders openly and deliberately. They are the exact frontier where the map is still blank, and they are the shortlist for the next dictionary update — each one, once identified, sharpens the mailbox-provider ranking for everyone.

The top 100

#	MX target	Domains
1	`mail.levikof.com`	894
2	`localhost`	467
3	`mail`	239
4	`mail.parktons.com`	178
5	`ns4.forevermail.com`	170
6	`ms06.cv-library.co.uk`	170
7	`ms07.cv-library.co.uk`	170
8	`ms08.cv-library.co.uk`	170
9	`mail1.sbnation.com`	166
10	`mail2.recop.jp`	161
11	`alltheemails.com`	156
12	`mail.autoline.com.ua`	136
13	`mx2.z-ns.net`	135
14	`mx.email-messaging.com`	133
15	`lbmx.bcc.gov.bd`	131
16	`mail.pickelhost.com`	125
17	`s.mail.dcsaas.net`	119
18	`entrap-01.hostns.io`	118
19	`entrap-02.hostns.io`	118
20	`entrap-03.hostns.io`	118
21	`mxi.alpha-prm.jp`	118
22	`mx1d10.thinline.cz`	114
23	`mx1b20.thinline.cz`	114
24	`mx1.ticketsinbound.com`	113
25	`mx2.ticketsinbound.com`	110
26	`mail.mpcloud.net`	106
27	`mx.maxns.net`	100
28	`~`	98
29	`mx-backup.serveriai.lt`	98
30	`mailgw01.host.it`	90
31	`mx2.netim.net`	89
32	`mx1.netim.net`	88
33	`mailgw02.host.it`	88
34	`amazon-smtp.amazon.com`	87
35	`mail-fr.securemail.pro`	85
36	`mx.vshosting.eu`	85
37	`cloudmail.auto-vision.ru`	82
38	`mail.vipmailservice.com`	82
39	`mx6.kvnbw.de`	82
40	`mx7.kvnbw.de`	82
41	`mx8.kvnbw.de`	82
42	`mx9.kvnbw.de`	82
43	`mx-01.mail-forwarder.io`	81
44	`mx1-dk.centerasecurity.dk`	79
45	`mx2-dk.centerasecurity.dk`	79
46	`mailforward.dnsv.jp`	79
47	`mx-02.mail-forwarder.io`	79
48	`email.webglobe.cz`	75
49	`email2.webglobe.cz`	75
50	`email3.webglobe.cz`	74
51	`email4.webglobe.cz`	74
52	`mx.aams4.jp`	74
53	`mx1.email-cluster.com`	74
54	`mx3-dk.centerasecurity.dk`	73
55	`mx2.email-cluster.com`	73
56	`mx-0.aams4.jp`	71
57	`mx-1.aams4.jp`	71
58	`failover1.email-cluster.com`	71
59	`mail.bluetie.com`	70
60	`mail.global.frontbridge.com`	70
61	`void.blackhole.mx`	69
62	`gmail22.gadmail.de`	69
63	`gmail23.gadmail.de`	69
64	`wmail22.gadmail.de`	69
65	`q01es.mail.s-web.de`	69
66	`q02es.mail.s-web.de`	69
67	`r01es.mail.s-web.de`	69
68	`r02es.mail.s-web.de`	69
69	`wmail23.gadmail.de`	68
70	`posta.mediacenter.hu`	67
71	`posta2.mediacenter.hu`	67
72	`posta4.mediacenter.hu`	67
73	`posta5.mediacenter.hu`	67
74	`mta.vshosting.eu`	67
75	`townsites.dnsmaster.net`	67
76	`mxa.expediagroup.com`	67
77	`mxb.expediagroup.com`	67
78	`posta3.mediacenter.hu`	66
79	`mx4.emailowl.com`	65
80	`mx1.alwaysdata.com`	65
81	`mx2.alwaysdata.com`	65
82	`rmail22.gadmail.de`	65
83	`rmail23.gadmail.de`	65
84	`mx.sendcloud.org`	64
85	`omail22.gadmail.de`	64
86	`omail23.gadmail.de`	64
87	`mx5.emailowl.com`	63
88	`mx1.simplelogin.co`	63
89	`mx2.simplelogin.co`	63
90	`smtp-avas.seeweb.it`	63
91	`smtp.faisco.cn`	62
92	`mx6.emailowl.com`	62
93	`mx01.statens-it.dk`	62
94	`mx02.statens-it.dk`	62
95	`mx03.statens-it.dk`	62
96	`mx04.statens-it.dk`	62
97	`mx05.statens-it.dk`	62
98	`mx06.statens-it.dk`	62
99	`mx07.statens-it.dk`	62
100	`mx08.statens-it.dk`	62

Provider-sized clusters to investigate next

Related hostnames are grouped by registrable base domain so one confirmed provider rule can explain several targets at once. Ranked by total occurrences in this snapshot.

Base domain	Occurrences	Targets	Largest target
`arsmtp.com`	1,433	1,433	`11x17-com.mx1.arsmtp.com`
`msv1.invalid`	985	981	`ea9c4067f56ecb47c76d2535ab13b2.msv1.invalid`
`levikof.com`	894	1	`mail.levikof.com`
`trendmicro.eu`	849	507	`adresseavisen.in.tmes.trendmicro.eu`
`s-web.de`	826	26	`q01es.mail.s-web.de`
`sakura.ne.jp`	715	652	`www3178.sakura.ne.jp`
`mxthunder.net`	690	657	`reska-id.p20.mxthunder.net`
`dfn.de`	676	378	`b1234.mx.srv.dfn.de`
`mailcontrol.com`	582	417	`cluster-d.mailcontrol.com`
`gadmail.de`	533	8	`gmail22.gadmail.de`
`fortimailcloud.com`	518	428	`dhl-com.fortimailcloud.com`
`cv-library.co.uk`	510	3	`ms06.cv-library.co.uk`
`home.pl`	500	423	`serwer1429664.home.pl`
`statens-it.dk`	496	8	`mx01.statens-it.dk`
`spamhero.net`	446	440	`ccsinfo-com.p20.spamhero.net`
`psmtp.com`	414	364	`adobe.com.mail5.psmtp.com`
`titanhq.com`	392	121	`eu1-smtp-mx1.titanhq.com`
`mailinblack.com`	376	76	`mx-mibc-fr-11.mailinblack.com`
`hostns.io`	367	15	`entrap-01.hostns.io`
`mediacenter.hu`	334	5	`posta.mediacenter.hu`

Download the full candidate queue →

How to use this list

If you recognize a hostname here — especially one you operate — tell us what it is, and it moves from an anonymous string to a named provider in the next scan. For researchers, the list is a live sample of the internet's less-charted email infrastructure, ranked by how many top-1M domains depend on it.

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Frequently asked questions

What is an unmatched MX hostname?

It is a MX hostname that appears frequently in the Tranco top-1M but is not yet mapped to a named provider in our classification dictionary, as of September 22, 2026.

How often does this list update?

It is recomputed with every daily scan and shrinks as the classification dictionary is extended.