theoremone.co

Valid Email Server
Domain Lookup › theoremone.co

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
theoremone.co
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-01 06:55:56 UTC · ↺ Refresh

MX Hostnames

  • alt1.aspmx.l.google.com
  • aspmx2.googlemail.com
  • aspmx.l.google.com
  • alt2.aspmx.l.google.com
  • aspmx3.googlemail.com

MX Priorities

  • alt2.aspmx.l.google.com: 5
  • aspmx.l.google.com: 1
  • aspmx2.googlemail.com: 10
  • aspmx3.googlemail.com: 10
  • alt1.aspmx.l.google.com: 5

A / AAAA Records

  • 198.202.211.1 (no PTR)

Mail Server IPs

  • 172.253.116.27 ↩ dj-in-f27.1e100.net
  • 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
  • 142.251.111.26 ↩ bk-in-f26.1e100.net
  • 2607:f8b0:4004:c1f::1a ↩ pd-in-f26.1e100.net
  • 108.177.123.27 ↩ lcscld-in-f27.1e100.net
  • 2800:3f0:4003:c0f::1b (no PTR)
  • 2800:3f0:4003:c0f::1a (no PTR)

SOA Record

Raw SOA ns-1159.awsdns-16.org awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1159.awsdns-16.org
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-1159.awsdns-16.org
ns-1759.awsdns-27.co.uk
ns-284.awsdns-35.com
ns-871.awsdns-44.net

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:7845552.spf04.hubspotemail.net ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 2 found
google._domainkey
k1._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

18 records
  • google-site-verification=zsJG0JxVdPekZlmUzPO7Kpxg6cobVIN09cZYRpMMbWM
  • hubspot-domain-verification=MTRmYTRjZDAtM2M2OC00YWE4LThhNzQtMGFmMmIwYzM0ODEz
  • lucid-verification=VQN0eau-zcm.bdh9dra
  • apple-domain-verification=BeMDmVddAqcoUl09
  • SPFv=spf1 include:_spf.google.com include:7845552.spf04.hubspotemail.net ~all
  • atlassian-domain-verification=mj/2ovdrPvBeStSvgSpLe/1IaZyOAkQas3r57p9FiIWsbLitWEgksjDs64k5f97n
  • ZOOM_verify_vPWnzYdSYdp2YbQ60zJVbe
  • asv=5660a994a07bbc0a4785982b79d339fb
  • atlassian-domain-verification=s5UTL5U0TH7aJI3WNJH42VY9ipInZXHw7cZVpAwiR2p7+CCXRbNxVsLgzpI5bZAu
  • google-site-verification=TDr473Y5Ti88iN1qjy2gDqA0RCc9fsJen-xbUo2jqHo
  • knowbe4-site-verification=65401c417331f00d31703711353b431b
  • figma-domain-verification=21b17e882b16205ab016844a6d53fa7c6488f4c92e03ee5200a5bbfd473bb061-1726561337
  • google-site-verification=p5NAZWhH3Lk81oIJZjZIZPL4Wj9SuS_3pixfSltaDYw
  • MS=ms23066939
  • miro-verification=bd22b9209af2fec35069f7e83603afd23daecf3b
  • airtable-verification=64fffc729a1de4ee7e516f14be60b3e6
  • notion-domain-verification=GrVp9G67iQKdQWjRTm9ysXauqa9rGoZDPFdTfrEN74u
  • docusign=f542931c-ebe2-481b-b91d-b327884ef377
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