Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
knollengineering.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 00:56:23 UTC · ↺ Refresh
MX Hostnames
- mx2c45.carrierzone.com
- mx1c45.carrierzone.com
- mx4c45.carrierzone.com
- mx3c45.carrierzone.com
MX Priorities
- mx2c45.carrierzone.com: 100
- mx4c45.carrierzone.com: 120
- mx3c45.carrierzone.com: 110
- mx1c45.carrierzone.com: 10
A / AAAA Records
- 216.55.149.9 ↩ hostedc45.carrierzone.com
Mail Server IPs
- 216.55.149.42 ↩ mx2c45.carrierzone.com
- 216.55.149.44 ↩ mx4c45.carrierzone.com
- 216.55.149.43 ↩ mx3c45.carrierzone.com
- 216.55.149.41 ↩ mx1c45.carrierzone.com
SOA Record
Raw SOA
ns1.digitalspaceportal.net postmaster.carrierzone.com 2025111913 86400 300 3600000 300
Primary NS (mname)
ns1.digitalspaceportal.net
Admin Email (rname)
postmaster@carrierzone.com
Serial
2025111913
Refresh
86400s
Retry
300s
Expire
3600000s
Minimum TTL
300s
Nameservers (NS)
ns1.digitalspaceportal.net
ns2.digitalspaceportal.net
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx include:spfc45.carrierzone.com include:verticalresponse.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 a mx include:spfc45.carrierzone.com include:verticalresponse.com ~all
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