Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
duncker-humblot.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-26 09:27:36 UTC · ↺ Refresh
MX Hostnames
- mavas3.cbxnet.de
- mavas2.cbxnet.de
- dunckerhumblot-de01i.mail.protection.outlook.com
- mail.duncker-humblot.de
MX Priorities
- dunckerhumblot-de01i.mail.protection.outlook.com: 200
- mail.duncker-humblot.de: 250
- mavas2.cbxnet.de: 180
- mavas3.cbxnet.de: 190
A / AAAA Records
- 104.26.0.13
- 172.67.72.30
- 104.26.1.13
- 2606:4700:20::681a:d
- 2606:4700:20::681a:10d
- 2606:4700:20::ac43:481e
Mail Server IPs
- 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 2a01:111:f403:ca27:: ↩ 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:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 212.87.46.93 ↩ autodiscover.duncker-humblot.de
- 212.87.33.79 ↩ mavas2.cbxnet.de
- 212.87.33.80
SOA Record
Raw SOA
joyce.ns.cloudflare.com dns.cloudflare.com 2399410887 10000 2400 604800 1800
Primary NS (mname)
joyce.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399410887
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
lars.ns.cloudflare.com
joyce.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:212.87.32.0/19 ip4:5.9.36.108 include:sendgrid.net include:spf.crsend.com include:_spf.wirth-horn.de include:spf.protection.outlook.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;pct=100;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 ip4:212.87.32.0/19 ip4:5.9.36.108 include:sendgrid.net include:spf.crsend.com include:_spf.wirth-horn.de include:spf.protection.outlook.com ~all
- MS=ms15482939
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