cobalt.io

Valid Email Server
Domain Lookup › cobalt.io
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
cobalt.io
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-21 03:32:42 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

No priority data.

A / AAAA Records

  • 104.18.30.198
  • 104.18.31.198
  • 2606:4700::6812:1ec6
  • 2606:4700::6812:1fc6

Mail Server IPs

No IPs resolved.

SOA Record

No SOA record found.

Nameservers (NS)

sam.ns.cloudflare.com
amy.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 include:_netblocks.google.com include:_netblocks2.google.com include:_netblocks3.google.com include:spf.mandrillapp.com include:servers.mcsv.net include:2689945.spf06.hubspotemail.net include:_spf.salesforce.com include:_spf.atlassian.net include:mailgun.org -all
📊 DNS lookups: 9/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; sp=reject;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject

DKIM Selectors

✓ 13 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
mail._domainkey
dkim._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
zoho._domainkey
sendgrid._domainkey
mxvault._domainkey
amazonses._domainkey
✓ Public key: 216 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=XSUewQ0xcW8_BseBcTj1cd6jTsLi_6613X6F4ir5jLs
  • 1password-site-verification=O4DM5FYB4NHQTGMYHHHW3ASD3A
  • MS=ms80963997
  • atlassian-sending-domain-verification=0c6d482c-a137-4625-918a-3e52073e91f8
  • SPFv=spf1 include:_netblocks.google.com include:_netblocks2.google.com include:_netblocks3.google.com include:spf.mandrillapp.com include:servers.mcsv.net include:2689945.spf06.hubspotemail.net include:_spf.salesforce.com include:_spf.atlassian.net include:mailgun.org -all
  • google-site-verification=9A45EhVXOBWKOhZNZrrWYNzc2Ff39sJ-gh3NHpNU8FE
  • hubspot-domain-verification=ZmRmYTM5ODEtZTVjZS00ZDhhLWIwOGEtYWQ1NWIwNmVkMTVj
  • MS=ms34227156
  • loom-site-verification=930d4543390b49dca7a8cbbfa83eb635
  • atlassian-domain-verification=Rd+VyXXMEEjBU6TgMmlvhW+vD73qv5Pk98MnRLbI++OSfjuK-fcg+o+ekem2jVqY
  • MS=0D3F145C34419C2E61549B9185FA7B68FECBB3AE
  • apple-domain-verification=Pod9Gkt12SLAEbD9
  • atlassian-domain-verification=sHF0OnWtWBTy+uMYmmvQfD76nAVzZa6wLyKuDNKsJOlAbs7Ni78C1+iCQiBWpxw8
  • jamf-site-verification=C4iboBoA5PLx5sGLE0lN2g
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