Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
hs-bremerhaven.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 16:31:43 UTC · ↺ Refresh
MX Hostnames
- a2981.mx.srv.dfn.de
- c2981.mx.srv.dfn.de
- b2981.mx.srv.dfn.de
MX Priorities
- b2981.mx.srv.dfn.de: 10
- c2981.mx.srv.dfn.de: 10
- a2981.mx.srv.dfn.de: 10
A / AAAA Records
- 192.109.135.50 ↩ www.hs-bremerhaven.de
- 2001:638:706:508::50 ↩ www.hs-bremerhaven.de
Mail Server IPs
- 194.95.235.92 ↩ b2981.mx.srv.dfn.de
- 194.95.239.92 ↩ c2981.mx.srv.dfn.de
- 194.95.233.92 ↩ a2981.mx.srv.dfn.de
SOA Record
Raw SOA
ns1.hs-bremerhaven.de fbehrens.hs-bremerhaven.de 2026450944 14400 3600 1209600 86400
Primary NS (mname)
ns1.hs-bremerhaven.de
Admin Email (rname)
fbehrens@hs-bremerhaven.de
Serial
2026450944
Refresh
14400s
Retry
3600s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
deneb.dfn.de
netu1.awi.de
ns1.hs-bremerhaven.de
ns2.hs-bremerhaven.de
SPF Record
✓ Strict (-all)
v=spf1 a:smtp.hs-bremerhaven.de a:smtp3.hs-bremerhaven.de a:smtpgw.hs-bremerhaven.de a:imap.hs-bremerhaven.de mx include:_spf.zimpel.de include:spf.protection.outlook.com -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;sp=reject;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];adkim=r;aspf=r
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 736 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
6 records- -4fl-rb1-26d
- SPFv=spf1 a:smtp.hs-bremerhaven.de a:smtp3.hs-bremerhaven.de a:smtpgw.hs-bremerhaven.de a:imap.hs-bremerhaven.de mx include:_spf.zimpel.de include:spf.protection.outlook.com -all
- MS=ms64698491
- adobe-idp-site-verification=105ae201644e33c44854a8ecf8fa5e984da8d9faec4d6cfb359d13ac6f2fb42b
- google-site-verification=NMHa_VmqCgGeDX3640bs36bhO_giALvm-R8W72-I7aI
- MS=ms38758922
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