Unmatched MX targets top 100

According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 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

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 targetDomains
1localhost518
2mx.services276
3mail252
4zonemx.eu193
5mail1.sbnation.com166
6~150
7alltheemails.com143
8mx.email-messaging.com142
9mail.autoline.com.ua138
10mx2.z-ns.net137
11mail.parktons.com135
12uk.mx1.mailanyone.net119
13uk.mx2.mx25.net119
14uk.mx3.mailanyone.net116
15mxi.alpha-prm.jp114
16lbmx.bcc.gov.bd114
17s.mail.dcsaas.net113
18uk.mx4.mx25.net112
19mx1d10.thinline.cz110
20mx1b20.thinline.cz110
21se.mx1.mailanyone.net103
22se.mx2.mx25.net103
23mx1.ticketsinbound.com101
24mailin.mx-hub.sk101
25mx1.cleanmx.pt100
26mailin.mx-hub.cz100
27mx2.cleanmx.pt99
28se.mx3.mailanyone.net98
29mx.maxns.net97
30se.mx4.mx25.net97
31mx2.ticketsinbound.com97
32cloudmail.auto-vision.ru96
33mailin.mx-hub.eu96
34mail.vipmailservice.com91
35smtp-fwd.wordpress.com89
36mailforward.dnsv.jp87
37amazon-smtp.amazon.com84
38mx-backup.serveriai.lt83
39mx1-dk.centerasecurity.dk82
40mx2-dk.centerasecurity.dk82
41mx01.1and1.fr78
42mx00.1and1.fr77
43mx3-dk.centerasecurity.dk77
44sitemail.everyone.net76
45mx.aams4.jp76
46mx-01.mail-forwarder.io76
47mail.global.frontbridge.com74
48mx-02.mail-forwarder.io74
49mx1.netim.net73
50mx2.netim.net73
51mx01.1and1.es73
52void.blackhole.mx73
53mx-0.aams4.jp73
54mx-1.aams4.jp73
55mail.lakennetwork.com73
56mx.sendcloud.org72
57mx1.email-cluster.com72
58mx2.email-cluster.com72
59mx.vshosting.eu72
60mail-fr.securemail.pro71
61failover1.email-cluster.com70
62q01es.mail.s-web.de70
63q02es.mail.s-web.de70
64r01es.mail.s-web.de70
65r02es.mail.s-web.de70
66smtp-avas.seeweb.it69
67smtp.faisco.cn68
68mx00.1and1.es67
69mxa.expediagroup.com67
70mxb.expediagroup.com67
71mx.emailarray.com66
72mx.spamfilter.io65
73mail.mpcloud.net65
74mx2.emailarray.com65
75mx1.nepal.gov.np64
76antispam.korea.kr63
77mx2.nepal.gov.np63
78posta.mediacenter.hu62
79posta2.mediacenter.hu62
80posta4.mediacenter.hu62
81posta5.mediacenter.hu62
82mx1.simplelogin.co62
83mx2.simplelogin.co62
84email.webglobe.cz62
85email2.webglobe.cz62
86mx6.kvnbw.de62
87mx7.kvnbw.de62
88mx8.kvnbw.de62
89mx9.kvnbw.de62
90posta3.mediacenter.hu61
91mx1.oderland.com61
92mx2.oderland.com61
93mx1.daouoffice.com61
94email3.webglobe.cz60
95email4.webglobe.cz60
96mx01.statens-it.dk60
97mx02.statens-it.dk60
98mx03.statens-it.dk60
99mx04.statens-it.dk60
100mx05.statens-it.dk60

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 July 13, 2026.

How often does this list update?

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