Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
shelterbox.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 03:37:37 UTC · ↺ Refresh
MX Hostnames
- shelterbox-de.mail.protection.outlook.com
MX Priorities
- shelterbox-de.mail.protection.outlook.com: 1
A / AAAA Records
- 172.67.196.40 (no PTR)
- 104.21.57.252 (no PTR)
- 2606:4700:3034::6815:39fc
- 2606:4700:3031::ac43:c428
Mail Server IPs
- 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
- 52.101.73.16 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
- 52.101.68.25 ↩ mail-db8pr02cu00101.inbound.protection.outlook.com
- 52.101.68.36 ↩ mail-db5pr02cu00104.inbound.protection.outlook.com
- 2a01:111:f403:ca09::1 ↩ mail-as9pr07cu00301.inbound.protection.outlook.com
- 2a01:111:f403:ca04::8 ↩ mail-db5pr02cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09:: ↩ mail-am3pr04cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca09::f ↩ mail-am7pr05cu00307.inbound.protection.outlook.com
SOA Record
Raw SOA
jason.ns.cloudflare.com dns.cloudflare.com 2399222257 10000 2400 604800 1800
Primary NS (mname)
jason.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399222257
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
nora.ns.cloudflare.com
jason.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 IP4:109.109.135.253 include:spf.protection.outlook.com include:servers.mcsv.net include:_spf-eu.ionos.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 IP4:109.109.135.253 include:spf.protection.outlook.com include:servers.mcsv.net include:_spf-eu.ionos.com -all
- MS=ms43004315
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