Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
kerson.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-02 01:36:29 UTC · ↺ Refresh
MX Hostnames
- mx00.1and1.com
- mx01.1and1.com
MX Priorities
- mx01.1and1.com: 10
- mx00.1and1.com: 1
A / AAAA Records
- 198.185.159.145 (no PTR)
- 198.185.159.144 (no PTR)
- 198.49.23.144 (no PTR)
- 198.49.23.145 (no PTR)
Mail Server IPs
- 74.208.5.21 ↩ mx01.perfora.net
- 74.208.5.3 ↩ mx00.perfora.net
SOA Record
Raw SOA
dns105.register.com root.register.com 123031305 10800 3600 604800 3600
Primary NS (mname)
dns105.register.com
Admin Email (rname)
root@register.com
Serial
123031305
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
dns106.register.com
dns105.register.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict 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
2 records- SPFv=spf1 include:spf.protection.outlook.com -all
- SPFv=spf1 include:_spf.perfora.net include:_spf-us.ionos.com include:_spf.kundenserver.de ~all
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