c40.org

Valid Email Server

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
c40.org
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-29 07:56:01 UTC · ↺ Refresh

MX Hostnames

  • alt3.aspmx.l.google.com
  • alt1.aspmx.l.google.com
  • alt4.aspmx.l.google.com
  • aspmx.l.google.com
  • alt2.aspmx.l.google.com

MX Priorities

  • alt4.aspmx.l.google.com: 10
  • aspmx.l.google.com: 0
  • alt1.aspmx.l.google.com: 5
  • alt2.aspmx.l.google.com: 5
  • alt3.aspmx.l.google.com: 10

A / AAAA Records

  • 162.159.134.42

Mail Server IPs

  • 173.194.76.27 ↩ ws-in-f27.1e100.net
  • 2a00:1450:400c:c00::1b ↩ ws-in-f27.1e100.net
  • 142.251.111.26 ↩ bk-in-f26.1e100.net
  • 2607:f8b0:4004:c06::1b ↩ bg-in-f27.1e100.net
  • 108.177.123.27 ↩ lcscld-in-f27.1e100.net
  • 2800:3f0:4003:c0f::1b (no PTR)
  • 172.253.116.26 ↩ dj-in-f26.1e100.net
  • 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
  • 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
  • 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net

SOA Record

Raw SOA udns1.cscdns.net hostmaster.cscdns.net 2019101319 28800 7200 604800 14400
Primary NS (mname)
udns1.cscdns.net
Admin Email (rname)
hostmaster@cscdns.net
Serial
2019101319
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
14400s

Nameservers (NS)

udns2.cscdns.uk
udns1.cscdns.net

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:spf.mailjet.com include:spf.protection.outlook.com include:spfa.mailendo.com include:_spf.c40.abzt.de include:mailgun.org include:spf1.formassembly.com include:_spf.salesforce.com ~all
📊 DNS lookups: 8/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; pct=100; adkim=s; aspf=s
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Strict · DKIM alignment: Strict
📧 Reports → mailto:[email protected]

DKIM Selectors

✓ 1 found
google._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

14 records
  • google-site-verification=VgrKSnQNxUTThbTuyt2t6wWf1h3sNA2xM_spBkn85ng
  • box-domain-verification=41a0fb4615564014713947f6e4fc6666611d33d29906d6243fb2791b149dfb0a
  • sophos-domain-verification=425a8e65d9216e0541002caa4216956d94d41281b7ed292a7f3eaa305e26f3a3
  • parallels-domain-verification=6c6bf75556914fa8a106c68d64b59096fdd8ee72467246ada70df07398a80466
  • SPFv=spf1 include:_spf.google.com include:spf.mailjet.com include:spf.protection.outlook.com include:spfa.mailendo.com include:_spf.c40.abzt.de include:mailgun.org include:spf1.formassembly.com include:_spf.salesforce.com ~all
  • ca3-7c7512e6306140a9b84bce6c1b6fa6cf
  • ca3-ba043acfa10347bf87733a7269474909
  • airalo-domain-verification=JTn1dKkJtUXbMOy
  • apple-domain-verification=cQgvpWM5BEhMN5kF
  • apple-domain-verification=tSZP7HgzgBq8rXtJ
  • jamf-site-verification=VUdW1uzNB1oToCFdhBc6uA
  • canva-site-verification=ceTWkY6i6NutIo2JAmsjOQ
  • mentimeter-00bb42f9-906d-4658-a68e-d3dd20962123
  • google-site-verification=P2HUeBp7_Y2TUd0nuFQDyWwtg8vcfLtg_HhwF_k1BfQ
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