cobuildings.net

Valid Email Server
Domain Lookup › cobuildings.net

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
cobuildings.net
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-19 22:10:45 UTC · ↺ Refresh

MX Hostnames

  • ASPMX4.GOOGLEMAIL.COM
  • ASPMX5.GOOGLEMAIL.COM
  • ASPMX3.GOOGLEMAIL.COM
  • ASPMX2.GOOGLEMAIL.COM
  • ASPMX.L.GOOGLE.COM
  • ALT2.ASPMX.L.GOOGLE.COM
  • ALT1.ASPMX.L.GOOGLE.COM

MX Priorities

  • alt2.aspmx.l.google.com: 20
  • alt1.aspmx.l.google.com: 20
  • aspmx5.googlemail.com: 30
  • aspmx4.googlemail.com: 30
  • aspmx3.googlemail.com: 30
  • aspmx.l.google.com: 10
  • aspmx2.googlemail.com: 30

A / AAAA Records

  • 198.199.117.119 (no PTR)

Mail Server IPs

  • 172.253.116.26 ↩ dj-in-f26.1e100.net
  • 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
  • 108.177.123.26 ↩ lcscld-in-f26.1e100.net
  • 2800:3f0:4003:c0f::1a (no PTR)
  • 173.194.76.26 ↩ ws-in-f26.1e100.net
  • 2a00:1450:400c:c00::1a ↩ ws-in-f26.1e100.net
  • 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
  • 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net

SOA Record

Raw SOA ns1.slicehost.net ipadmin.stabletransit.com 1728414600 3600 300 1814400 300
Primary NS (mname)
ns1.slicehost.net
Admin Email (rname)
ipadmin@stabletransit.com
Serial
1728414600
Refresh
3600s
Retry
300s
Expire
1814400s
Minimum TTL
300s

Nameservers (NS)

ns1.slicehost.net
ns2.slicehost.net
ns3.slicehost.net

SPF Record

✓ Soft Fail (~all)
v=spf1 a:e.uhaul.com a:t.uhaul.com a:esa.hc5529-86.iphmx.com include:_spf.google.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing

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

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

1 record
  • SPFv=spf1 a:e.uhaul.com a:t.uhaul.com a:esa.hc5529-86.iphmx.com include:_spf.google.com ~all
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