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Sender Score

Results for IP address
12.34.56.789

Sending Domain Information

MX Record   
SPF Record   

SSL Information

SSL Certificate
Owner
firstclass.cz
Issued by
WE1
Valid Until
02/25/2026
Sending IPs
IP Address    Hostname Volume    Sender Score   
23.92.74.223 maestia.tf1.fr. HIGH 52
23.111.156.219 wholecellviz.stanford.edu. VERY HIGH 90
45.13.137.24 m1-out-mua-15.websupport.sk. VERY HIGH 66
50.31.205.4 mta4-ab1.mtasv.net. VERY HIGH 96
50.31.205.5 mta5-ab1.mtasv.net. VERY HIGH 96
50.31.205.6 mta6-ab1.mtasv.net. VERY HIGH 96
50.31.205.12 mta12-ab1.mtasv.net. VERY HIGH 99
50.31.205.14 mta14-ab1.mtasv.net. VERY HIGH 89
50.31.205.17 mta17-ab1.mtasv.net. VERY HIGH 97
50.31.205.18 mta18-ab1.mtasv.net. VERY HIGH 99
50.31.205.19 mta19-ab1.mtasv.net. VERY HIGH 97
50.31.205.29 mta29-ab1.mtasv.net. VERY HIGH 99
50.31.205.31 mta31-ab1.mtasv.net. VERY HIGH 96
50.31.205.32 mta32-ab1.mtasv.net. VERY HIGH 96
50.31.205.33 mta33-ab1.mtasv.net. VERY HIGH 96
50.31.205.34 mta34-ab1.mtasv.net. VERY HIGH 99
50.31.205.220 mta220-ab1.mtasv.net. VERY HIGH 99
50.31.205.246 mta246-ab1.mtasv.net. VERY HIGH 96
51.178.100.134 syn-051-178-100-134.biz.spectrum.com. VERY HIGH 83
54.240.3.9 a3-9.smtp-out.eu-west-1.amazonses.com. VERY HIGH 87
54.240.3.10 a3-10.smtp-out.eu-west-1.amazonses.com. VERY HIGH 99
54.240.3.11 a3-11.smtp-out.eu-west-1.amazonses.com. VERY HIGH 87
54.240.3.12 a3-12.smtp-out.eu-west-1.amazonses.com. VERY HIGH 96
54.240.3.13 a3-13.smtp-out.eu-west-1.amazonses.com. VERY HIGH 93
54.240.3.14 a3-14.smtp-out.eu-west-1.amazonses.com. VERY HIGH 99
54.240.3.15 a3-15.smtp-out.eu-west-1.amazonses.com. VERY HIGH 96
54.240.3.16 a3-16.smtp-out.eu-west-1.amazonses.com. VERY HIGH 99
54.240.3.23 a3-23.smtp-out.eu-west-1.amazonses.com. VERY HIGH 96
54.240.3.24 a3-24.smtp-out.eu-west-1.amazonses.com. VERY HIGH 83
54.240.3.25 a3-25.smtp-out.eu-west-1.amazonses.com. VERY HIGH 84
54.240.3.26 a3-26.smtp-out.eu-west-1.amazonses.com. VERY HIGH 96
54.240.3.27 a3-27.smtp-out.eu-west-1.amazonses.com. VERY HIGH 96
54.240.3.28 a3-28.smtp-out.eu-west-1.amazonses.com. VERY HIGH 96
54.240.3.29 a3-29.smtp-out.eu-west-1.amazonses.com. VERY HIGH 96
54.240.3.30 a3-30.smtp-out.eu-west-1.amazonses.com. VERY HIGH 87
54.240.6.53 a6-53.smtp-out.eu-west-1.amazonses.com. VERY HIGH 96
54.240.6.244 a6-244.smtp-out.eu-west-1.amazonses.com. VERY HIGH 96
54.240.6.245 a6-245.smtp-out.eu-west-1.amazonses.com. VERY HIGH 96
54.240.6.247 a6-247.smtp-out.eu-west-1.amazonses.com. VERY HIGH 87
66.240.223.33 0001.16f16.itm.appdeliverysecurity.cloud.com. VERY HIGH 42
70.32.1.251 actioncharacters.com. VERY HIGH 89
70.32.2.15 conversationnel.arkea.com. VERY HIGH 89
74.63.233.234 streaming.foxtel.com.au. VERY HIGH 89
74.63.239.94 cataratasdoiguacu-wl-mobile.bileto.sympla.com.br. VERY HIGH 86
77.93.211.222 p1.banan.cz. VERY HIGH 98
77.240.190.210 mail.aerohosting.cz. VERY HIGH 98
78.156.32.42 ir.rete.cz. HIGH 99
87.236.194.142 mailsvrred.digitree.cz. HIGH 99
89.116.106.140 mx3.limc.ufrj.br. HIGH 55
90.183.81.98 server.toner-discount.cz. HIGH 92
92.118.206.207 cybersecurity.csp.edu. VERY HIGH 83
104.245.209.196 mta196a-ord.mtasv.net. VERY HIGH 99
104.245.209.197 mta197a-ord.mtasv.net. VERY HIGH 99
104.245.209.198 mta198a-ord.mtasv.net. VERY HIGH 99
104.245.209.199 mta199a-ord.mtasv.net. VERY HIGH 99
104.245.209.210 mta210a-ord.mtasv.net. VERY HIGH 99
104.245.209.212 mta212a-ord.mtasv.net. VERY HIGH 99
104.245.209.213 mta213a-ord.mtasv.net. VERY HIGH 99
104.245.209.215 mta215a-ord.mtasv.net. VERY HIGH 99
104.245.209.216 mta216a-ord.mtasv.net. VERY HIGH 99
104.245.209.217 mta217a-ord.mtasv.net. VERY HIGH 99
107.155.67.126 cplusc-workshop.com. VERY HIGH 72
108.59.5.178 108-59-5-178.hinet-ip.hinet.net. VERY HIGH 51
108.178.2.238 mx3.limc.ufrj.br. VERY HIGH 83
141.95.141.197 nonpareil.uchicago.edu. HIGH 46
149.72.75.7 o3995.shared.klaviyomail.com. VERY HIGH 97
149.72.183.7 o1371.shared.klaviyomail.com. VERY HIGH 98
167.89.100.76 o1301.shared.klaviyomail.com. VERY HIGH 90
167.89.100.78 o1302.shared.klaviyomail.com. VERY HIGH 74
167.89.106.25 o1335.shared.klaviyomail.com. VERY HIGH 98
168.245.125.197 o1361.shared.klaviyomail.com. VERY HIGH 85
181.174.165.44 2c.a5.aeb5.ip4.static.sl-reverse.com. HIGH 63
185.129.138.111 mxavas-out-1.forpsi.com. VERY HIGH 99
185.129.138.112 mxavas-out-2.forpsi.com. VERY HIGH 99
185.129.138.113 mxavas-out-3.forpsi.com. VERY HIGH 99
185.155.98.47 mx3.limc.ufrj.br. VERY HIGH 88
194.182.86.98 citroencc-mail2.citroencc.cz. MODERATE 99
195.181.249.35 srs1.nameserver.sk. VERY HIGH 78
195.181.249.36 srs2.nameserver.sk. VERY HIGH 84
195.181.249.37 srs3.nameserver.sk. VERY HIGH 85
203.99.148.211 butterflies.foremost.com. VERY HIGH 89
212.4.158.51 tayend.mmsc.cz. HIGH 97
216.38.0.199 www.segpc.oi.com.br. HIGH 63
216.38.0.235 EB.00.26D8.ip4.static.sl-reverse.com. HIGH 43
217.11.236.90 smtp.discretepost.com. VERY HIGH 73
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