Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
capitalone.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 04:14:37 UTC · ↺ Refresh
MX Hostnames
- mx0a-001b4103.pphosted.com
- mx0b-001b4103.pphosted.com
MX Priorities
- mx0b-001b4103.pphosted.com: 10
- mx0a-001b4103.pphosted.com: 10
A / AAAA Records
- 204.63.43.34 (no PTR)
- 204.63.40.34 (no PTR)
Mail Server IPs
- 148.163.137.70 ↩ mx0b-001b4103.pphosted.com
- 148.163.133.70 ↩ mx0a-001b4103.pphosted.com
SOA Record
Raw SOA
ns1.capitalone.com hostmaster.capitalone.com 2023101008 10800 3600 2419200 300
Primary NS (mname)
ns1.capitalone.com
Admin Email (rname)
hostmaster@capitalone.com
Serial
2023101008
Refresh
10800s
Retry
3600s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
a7-64.akam.net
a3-64.akam.net
ns6.capitalone.com
a1-219.akam.net
ns3.capitalone.com
ns4.capitalone.com
ns1.capitalone.com
ns5.capitalone.com
a28-65.akam.net
a18-66.akam.net
a4-67.akam.net
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:148.163.151.254 ip4:148.163.155.198 ip4:148.163.137.70 ip4:148.163.133.70 ip4:205.220.175.235 ip4:205.220.163.236 ip4:27.126.144.0/21 ip4:64.106.247.198 ip4:66.70.7.91 ip4:68.233.76.14 ip4:97.107.118.192/26 ip4:63.150.74.35 include:gspf.capitalone.com include:gspf2.capitalone.com include:spf1.capitalone.com include:spf2.capitalone.com include:mir.capitalone.com include:sf.capitalone.com include:sf2.capitalone.com ~all
📊 DNS lookups: 7/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
k1._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: k1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
34 records- canva-site-verification=JesR4hQDXmNwA7gRLQzl2Q
- SPFv=spf1 ip4:148.163.151.254 ip4:148.163.155.198 ip4:148.163.137.70 ip4:148.163.133.70 ip4:205.220.175.235 ip4:205.220.163.236 ip4:27.126.144.0/21 ip4:64.106.247.198 ip4:66.70.7.91 ip4:68.233.76.14 ip4:97.107.118.192/26 ip4:63.150.74.35 include:gspf.capitalone.com include:gspf2.capitalone.com include:spf1.capitalone.com include:spf2.capitalone.com include:mir.capitalone.com include:sf.capitalone.com include:sf2.capitalone.com ~all
- pardot_53662_*=2baf8e151317092fab009d39b9b3b54115ebf8574aa28190acc5e323f46a35c7
- ibmid=2ab0b014-4530-4a96-a1ff-9b8b63cb11dd
- amazonses:mY3FcLIH42XJ7UOd016zj7E70aLJC0ToxSeHDbu4ED0=
- stripe-verification=c6003f2a2b0c44da187648efba686d84bc7fbfee9f84065195bcd25396aafc03
- segment-site-verification=SHqskCNjgX8qHrWypqBhrlyIlKIiPhza
- stripe-verification=9b5b31bd117e75d878ab5443a34936195b05670b7e90c77246a83074c1b3026d
- facebook-domain-verification=pk28hvpx4v9mcv6phz3hfxp3l29k49
- amazonses:7LynuQu4sbpvXHeCKvHp9Xu71Pp96GrgMItzeFcnXjw=
- workplace-domain-verification=p46pRtnSKxrhYjtHrLFIZduNBwPygQ
- stripe-verification=F5A938CA9C7E3D6521BABC2251AE47A691A61EDCA2A8A200E70E62AEA21871F0
- infoblox-domain-mastery=e0303a57595fc4373283b4b97b2c596f44690f1c66ae28ee7724c76c3bbc58594d
- 9MNsmf2eDkvemSwZwEBKS/Bg9zZ9L0Olk+lJunc9vnj+jjpwOpobyWoztU2CLq1D8BUdOmbu/dFqpaxdS5uT1Q==
- jamf-site-verification=8Zniy47FXAdhS9gUM5Hf2g
- google-site-verification=P3N7ieLoS9zskt3PidMZAon2POiYEPnDkRKpARONHYY
- atlassian-domain-verification=HfdEZ7cow9CpMjhORKKEUM2ChbCStdf4cyEdnEkqXYMtmIjaAa2aqoYZBjNu116V
- adobe-idp-site-verification=f22e41ed-57c5-40d9-b7f5-f4099358d4a9
- amazonses:UpuWLV01aTL/yDaCHF86ALK1tUfPNwo/Nu0qyS6WOzE=
- MS=ms30245000
- docusign=0dffa9c5-5f4c-42f0-afd8-463ce2851e10
- jamf-site-verification=8qYsktMBx_h3qY4UtlEnXQ
- apple-domain-verification=oLe1vMbY1Cyn2KMRftMwXz4St8SmApvmfhvLwbY00zQ
- atlassian-domain-verification=TwuRaqiosb1Y9Ll0Cf7jukVj26/ef5EPFYZ7aWsKPI123UKbgpwLzw4pcCoUw/xl
- amazonses:aKxiQO0wyueJFAc2rDWOyXbFtjp6YtNF6k0ZOSLgefs=
- docusign=48e9743e-ef83-41ea-9100-56a81814aa66
- pardot53662=a2dda57f79459c8b8efe6549f7b0d96a7669972974aa4ffeebe0c59027fc24df
- apple-domain-verification=xsRjjZ8PTLeXP0sUn8b7BkdJoFXq61nUWTPPbtSjUhE
- pardot_53662_*=f371ef6a50eab6557e5541869ff75db4d3fbb21996ec9943f5bbe5486fdc40c6
- amazonses:ORKcsHfxtFcFR/gJ2YJQIS841UJBiakXr0snvfrAYWo=
- ACC9-DB58-B121-531B-7E95-1693-BF3A-D6C2
- amazonses:uJrZozWQS7qSfEZUjfvlmcU2Jlo1LfnMgqyPdYWk8/8=
- segment-site-verification=THWKmZp6L0bp54HUOVfLhVarEPLRuX3q
- google-site-verification=iSsTYPv40ZRdJhkCoq2toyNLuSpMZGA5umM5jIj4Mmk
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for capitalone.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits