Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cambiumlearning.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 15:27:39 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-2.mimecast.com
- us-smtp-inbound-1.mimecast.com
MX Priorities
- us-smtp-inbound-1.mimecast.com: 10
- us-smtp-inbound-2.mimecast.com: 10
A / AAAA Records
- 66.248.224.195 (no PTR)
Mail Server IPs
- 170.10.132.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.221 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-2.mimecast.com
SOA Record
Raw SOA
ns1.cambiumlearning.com hostmaster.cambiumlearning.com 2026031101 10800 3600 604800 3600
Primary NS (mname)
ns1.cambiumlearning.com
Admin Email (rname)
hostmaster@cambiumlearning.com
Serial
2026031101
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns1.cambiumlearning.com
ns2.cambiumlearning.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:50.238.167.160/27 ip4:66.151.242.3 ip4:67.139.115.194 ip4:98.110.223.0/24 ip4:208.85.53.0/24 ip4:149.72.231.47 ip4:149.72.196.66 include:us._netblocks.mimecast.com include:spf.protection.outlook.com include:spf.happyfox.com include:spfa.navexglobal.com include:amazonses.com include:_spf.salesforce.com ~all
📊 DNS lookups: 6/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
29 records- dropbox-domain-verification=oh50txjzm4rc
- Dynatrace-site-verification=0406ad5e-8b53-425f-98d3-c11c5681ceec__aetduvn3k5edaba5b0m32siudn
- logmein-verification-code=2f5e14fa-b739-4363-ac16-5176b1afe3c2
- atlassian-domain-verification=L0bOBwcaCZ7pbCPadtt181ogBzslfAMGJlHJK0Oo8sfjG70P8jLajw/vdPCahnvT
- autodesk-domain-verification=jX0IMw90rlYa3yBdNhdY
- cisco-ci-domain-verification=1f5a97af169a9b6ff88d57b15324f955aed5ed8bd9806057f4f2fea5016dafd6
- docusign=f184bbe7-b5eb-4569-a632-383d8172dbc0
- ZOOM_verify_6HaM0cUnQKyOrVNDZwm_EA
- google-site-verification=YT2JJtjSoAKcqv9w2597q_RMOg-38UzavyJf9Q8VGlk
- canva-site-verification=fFxuXLMQO3O48gzJqJZWzg
- SPFv=spf1 ip4:50.238.167.160/27 ip4:66.151.242.3 ip4:67.139.115.194 ip4:98.110.223.0/24 ip4:208.85.53.0/24 ip4:149.72.231.47 ip4:149.72.196.66 include:us._netblocks.mimecast.com include:spf.protection.outlook.com include:spf.happyfox.com include:spfa.navexglobal.com include:amazonses.com include:_spf.salesforce.com ~all
- duo_sso_verification=qTbuGSS7cRde9vvcPn5TA4KRPfzZjq7ewsMZD5IqXeNONyzigKxdi2NRMtxTdlx0
- MS=ms54177682
- jetbrains-domain-verification=7sqr9a10k4euu1f0xk0nxavyi
- miro-verification=09fc44d5072cb7782fa858d5536a5a32b35fb135
- adobe-sign-verification=4aae7998ea08e28c9f1ae5b242be19dd
- docusign=61422a61-dc24-40e2-a029-c7c916112943
- apple-domain-verification=BDGIOjwmNKbmFzTj
- zk5vy+KWY5LlKvqMFPOKgjOdxUDDKzgzGV+G7pleCJ1iqA0QqQq6nqP7lrCm/RBx8QZtxhyOVo27LQHaB/YktQ==
- logmein-verification-code=998b3a86-828a-46ed-b7f9-f8deeae6dbaf
- figma-domain-verification=cc673a12d9b2dab006839789dad445bbee1ae562d7e292f894fa63ef5a3d51c4-1729184745
- pendo-domain-verification=x-843Tg0mJAOvpPS0JaTyrrV3Vo
- postman-domain-verification=63fb9c25fe3e46a5c2cf4832101653d0292f0cec6b293e4ddf6be6130b074e21
- google-site-verification=v6yL8jNJa7J0liEjvHpGyBZzP8JdQzLEIEy8X0pixJE
- adobe-idp-site-verification=ff85075ae1cd2832fbce52b19a8bfca18b661e63dd2cf0a75777e8d0b0ea4bcc
- JRgcLyYdIUWcE3yXtgB/KPaC81FwFHL2mKlroeRto/dK9mG68jaPkP3/SPSzVChRzcmSUVK96OrY/xIo5ODMeQ==
- zoom-domain-verification=ZOOM_verify_a1061d539a7b42978163464444c4c79a
- google-site-verification=-1YXJbaKqgVTvtIzMyvIPwRFdEi0BjNPoiKgcBjDonw
- smartsheet-site-validation=lIcO0kNlhOl53mdMEbJBnxTzEAuY3LMj
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