Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
biotronik.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 21:05:49 UTC · ↺ Refresh
MX Hostnames
- biotronik-de.mail.protection.outlook.com
MX Priorities
- biotronik-de.mail.protection.outlook.com: 0
A / AAAA Records
- 91.204.11.39 (no PTR)
Mail Server IPs
- 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 52.101.168.0 ↩ mail-beup281cu00100.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
- 2a01:111:f403:ca27:: ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
SOA Record
Raw SOA
ns01.versatel.de hostmaster.versatel.de 2026031000 86400 28800 3600000 86400
Primary NS (mname)
ns01.versatel.de
Admin Email (rname)
hostmaster@versatel.de
Serial
2026031000
Refresh
86400s
Retry
28800s
Expire
3600000s
Minimum TTL
86400s
Nameservers (NS)
ns03.versatel.de
ns01.versatel.de
ns02.versatel.de
SPF Record
✓ Strict (-all)
v=spf1 ip4:91.204.8.0/24 include:spf.officernd.com include:spf.paragon-cc.de include:spf.mail-exchange.services include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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- atlassian-domain-verification=9x0aGkbwqaZ9kfqalVp3uF4csXRJOEMUUa02HNg/AaOR5daw8jbu2llQOXhaNZTV
- SPFv=spf1 ip4:91.204.8.0/24 include:spf.officernd.com include:spf.paragon-cc.de include:spf.mail-exchange.services include:spf.protection.outlook.com -all
Full email verification for biotronik.de
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