Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
kumon.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-17 19:45:58 UTC · ↺ Refresh
MX Hostnames
- d206822a.ess.barracudanetworks.com
- d206822b.ess.barracudanetworks.com
MX Priorities
- d206822b.ess.barracudanetworks.com: 60
- d206822a.ess.barracudanetworks.com: 50
A / AAAA Records
- 104.20.16.163 (no PTR)
- 172.66.152.234 (no PTR)
- 2606:4700:10::ac42:98ea (no PTR)
- 2606:4700:10::6814:10a3 (no PTR)
Mail Server IPs
- 209.222.82.253 ↩ mail.ess.barracuda.com
- 209.222.82.255 ↩ mail.ess.barracuda.com
- 209.222.82.252 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
anna.ns.cloudflare.com dns.cloudflare.com 2396598234 10000 2400 604800 1800
Primary NS (mname)
anna.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2396598234
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
apollo.ns.cloudflare.com
anna.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:209.137.158.39 ip4:209.137.158.100 ip4:209.137.158.3 ip4:168.245.124.70 ip4:50.31.63.189 ip4:54.161.239.102 ip4:3.213.158.246 ip4:3.223.65.47 include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
19 records- 951ptd1e2aftbukeiu04sht110
- kna-ksislite-us-useast-prod-web01.kna-globalproduction-useast-prod-ase01.p.azurewebsites.net
- facebook-domain-verification=1gtt6i9y2o0tupnob9b0qr99fs716j
- duo_sso_verification=LO90VQckJ27AwafBTI8gFJE6qbn0Yc3hPyEG3143Cfl86h3f2FJGA7diA2NF7xQj
- 1rhkm2pdtgp5g7ap29b9ouujma
- nri72l354jqes8ogqg3v5i6cuq
- eu63cu4vvt3qq5inqa9ad12urs
- SPFv=spf1 ip4:209.137.158.39 ip4:209.137.158.100 ip4:209.137.158.3 ip4:168.245.124.70 ip4:50.31.63.189 ip4:54.161.239.102 ip4:3.213.158.246 ip4:3.223.65.47 include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com -all
- etq3lkclmqa3u56r3t01dc0o4p
- box-domain-verification=754221040da1f80835bf2e8848c86371ffcccdd368b51fa510c79a85a9d3ae82
- ZOOM_verify_9uQmFfVjyUdrnk8nnqKe8B
- gHErfZFTsOKh2GxO2imgiIbdBx1Xtq2oC/LOkuWd+VUXkyDZubI+iJL6uaP/XE13Y00zfsldqdsj8Cn9PJkO9w==
- e3l6sjpqrsvhcsitdj8e77asvi
- 7ed4gqpk6t4smntkhgjtcvbndr
- MS=ms74885226
- google-site-verification=EpcqI78Pbi_mcZF7gxuoFnAQnLwCUUscCjKAkFvI-z8
- b80gtqcidu2g58kkavrq72e37q
- 4c88kavq3uajfikf0r6m50t5ea
- eb6klvsgbmj0et3ab09j85r9d7
Full email verification for kumon.com
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