polybit.de

Valid Email Server
Domain Lookup › polybit.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
polybit.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-28 21:31:18 UTC · ↺ Refresh

MX Hostnames

  • polybit-de.mail.protection.outlook.com

MX Priorities

  • polybit-de.mail.protection.outlook.com: 10

A / AAAA Records

  • 46.229.46.35 ↩ d302.x-mailer.de

Mail Server IPs

  • 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
  • 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
  • 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:ca27:: ↩ mail-beup281cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d::1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
  • 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com

SOA Record

Raw SOA ns3.nsentry.de hostmaster.polybit.de 2017013000 86400 7200 3600000 172800
Primary NS (mname)
ns3.nsentry.de
Admin Email (rname)
hostmaster@polybit.de
Serial
2017013000
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
172800s

Nameservers (NS)

ns3.nsentry.de
ns4.nsentry.de

SPF Record

✓ Strict (-all)
v=spf1 mx include:spf.protection.outlook.com include:newsmailservice.de include:spf.variomedia.de a:d283.x-mailer.de ip4:213.209.123.221 -all
📊 DNS lookups: 5/10
✓ 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
  • SPFv=spf1 mx include:spf.protection.outlook.com include:newsmailservice.de include:spf.variomedia.de a:d283.x-mailer.de ip4:213.209.123.221 -all
  • _globalsign-domain-verification=7ZVKLf5SDVKPmSOUnSGvgMI98BfY10XWjtnoSPDKt2
  • MS=ms79943537
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