dtb-computer.de

Valid Email Server
Domain Lookup › dtb-computer.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
dtb-computer.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-02 22:04:43 UTC · ↺ Refresh

MX Hostnames

  • mail.dtb-computer.de
  • dtbcomputer-de0i.mail.protection.outlook.com

MX Priorities

  • dtbcomputer-de0i.mail.protection.outlook.com: 0
  • mail.dtb-computer.de: 10

A / AAAA Records

  • 81.88.34.159 ↩ host194.alfahosting-server.de

Mail Server IPs

  • 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
  • 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:ca27:: ↩ mail-beup281cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 195.243.150.160 (no PTR)

SOA Record

Raw SOA cns1.alfahosting.info hostmaster\@alfahosting.de 2026030802 28800 7200 604800 10800
Primary NS (mname)
cns1.alfahosting.info
Admin Email (rname)
hostmaster\@alfahosting@de
Serial
2026030802
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
10800s

Nameservers (NS)

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

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ 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

2 records
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • MS=42E97A5BF898C81D2DF8CB22B41A80505D3B7076
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