s-i-b.de

Valid Email Server
Domain Lookup › s-i-b.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
s-i-b.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-25 13:27:27 UTC · ↺ Refresh

MX Hostnames

  • sib-de0k.mail.eo.outlook.com

MX Priorities

  • sib-de0k.mail.eo.outlook.com: 10

A / AAAA Records

  • 81.88.34.7 ↩ host311.alfahosting-server.de

Mail Server IPs

  • 52.101.73.6 ↩ mail-am6pr04cu00306.inbound.protection.outlook.com
  • 52.101.73.26 ↩ mail-as9pr05cu01302.inbound.protection.outlook.com
  • 52.101.68.3 ↩ mail-db7pr03cu00403.inbound.protection.outlook.com
  • 52.101.68.5 ↩ mail-du2pr03cu00105.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::f ↩ mail-db7pr03cu00507.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::c ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::4 ↩ mail-db4pr02cu00204.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::6 ↩ mail-am4pr0401cu00106.inbound.protection.outlook.com

SOA Record

Raw SOA cns1.alfahosting.info hostmaster.alfahosting.de 2026031402 28800 7200 604800 10800
Primary NS (mname)
cns1.alfahosting.info
Admin Email (rname)
hostmaster@alfahosting.de
Serial
2026031402
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
10800s

Nameservers (NS)

cns3.alfahosting.info
cns2.alfahosting.info
cns1.alfahosting.info

SPF Record

✓ Strict (-all)
v=spf1 a mx include:secure-mailgate.com include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✗ None detected

No 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

3 records
  • apple-domain-verification=6nwMlO7yWh1O06pY
  • MS=7C5E2CD3E55562C7D87AED861B7D2EF0BA869B94
  • SPFv=spf1 a mx include:secure-mailgate.com include:spf.protection.outlook.com -all
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