Websites using Barracuda for email

0.24% route mail through Barracuda 54,790 of 22.94 million domains that publish MX records, DNS sweep of Oct 2026

High-authority sites

Ordered by Open Page Rank, the domain's authority score from the open web link graph.

#	Website	OPROpen Page Rank
1	prnewswire.com	9.11
2	psychiatry.org	8.62
3	nv.gov	8.61
4	iste.org	8.53
5	iab.com	8.42
6	cbd.int	8.41
7	britishmuseum.org	8.39
8	bloomsbury.com	8.36
9	afsp.org	8.35
10	childhelp.org	8.35
11	aei.org	8.33
12	chathamhouse.org	8.31
13	nahb.org	8.25
14	unitedway.org	8.23
15	macmillan.org.uk	8.22
16	constitutioncenter.org	8.19
17	ascd.org	8.08
18	aia.org	8.05
19	unesco.de	8.04
20	autism.org.uk	8.03
21	heinonline.org	8.03
22	state.nv.us	8.03
23	aafa.org	8.01
24	essex.ac.uk	8.01
25	maryville.edu	8.01
26	toastmasters.org	8.00
27	flashtalking.com	7.99
28	wlu.ca	7.99
29	counseling.org	7.96
30	citizen.org	7.95
31	globalwellnessinstitute.org	7.94
32	nam.org	7.93
33	barracuda.com	7.91
34	marist.edu	7.90
35	whitney.org	7.89
36	afpglobal.org	7.87
37	na.org	7.86
38	nationalbreastcancer.org	7.86
39	arrl.org	7.85
40	bsr.org	7.84
41	innovid.com	7.82
42	rowman.com	7.82
43	theclimategroup.org	7.82
44	safenames.net	7.81
45	bbk.ac.uk	7.77
46	ctia.org	7.77
47	ifop.com	7.75
48	aitsl.edu.au	7.73
49	icex.es	7.73
50	une.edu.au	7.73
51	esade.edu	7.72
52	reconciliation.org.au	7.72
53	abqjournal.com	7.71
54	nra.org	7.70
55	osteopathic.org	7.69
56	cps.ca	7.68
57	scad.edu	7.68
58	usb.org	7.68
59	trusselltrust.org	7.67
60	gpb.org	7.64
61	santafe.edu	7.64
62	creakyjoints.org	7.63
63	moonfruit.com	7.62
64	aila.org	7.58
65	sustrans.org.uk	7.57
66	azbigmedia.com	7.56
67	climateweeknyc.org	7.56
68	mid-day.com	7.56
69	iab.net	7.55
70	sfn.org	7.53
71	gamingcommission.ca	7.52
72	gg.ca	7.51
73	asla.org	7.50
74	gaminglabs.com	7.50
75	asrm.org	7.48
76	ncnp.go.jp	7.48
77	secourspopulaire.fr	7.48
78	americanhumane.org	7.47
79	bookbaby.com	7.47
80	computable.nl	7.47
81	counterhate.com	7.47
82	fpri.org	7.47
83	int-res.com	7.46
84	nycbar.org	7.46
85	windeurope.org	7.46
86	afn.ca	7.45
87	inta.org	7.45
88	morehouse.edu	7.45
89	mtp.pl	7.45
90	nms.ac.uk	7.45
91	reclamecode.nl	7.45
92	uefi.org	7.45
93	archivists.org	7.44
94	jff.org	7.44
95	naspa.org	7.44
96	nmsdc.org	7.44
97	rsph.org.uk	7.44
98	trustedcomputinggroup.org	7.44
99	universitiesuk.ac.uk	7.44
100	zyxel.com	7.44

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Websites using Barracuda for email

High-authority sites

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