Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
bistum-os.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 20:00:13 UTC · ↺ Refresh
MX Hostnames
- bistumos-de01e.mail.protection.outlook.com
MX Priorities
- bistumos-de01e.mail.protection.outlook.com: 10
A / AAAA Records
- 185.175.196.65 (no PTR)
- 2a00:1c98:60:1090::1:4fa6:886d (no PTR)
Mail Server IPs
- 52.101.73.28 ↩ mail-am7pr05cu00204.inbound.protection.outlook.com
- 52.101.73.26 ↩ mail-as9pr05cu01302.inbound.protection.outlook.com
- 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 52.101.68.25 ↩ mail-db8pr02cu00101.inbound.protection.outlook.com
- 2a01:111:f403:ca04::e ↩ mail-db8pr02cu00106.inbound.protection.outlook.com
- 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::f ↩ mail-am7pr05cu00307.inbound.protection.outlook.com
- 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com
SOA Record
Raw SOA
a.ns14.net dns.itebo.de 2025100604 43200 7200 1209600 86400
Primary NS (mname)
a.ns14.net
Admin Email (rname)
dns@itebo.de
Serial
2025100604
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
b.ns14.net
c.ns14.net
d.ns14.net
a.ns14.net
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:91.249.168.162 include:spf.protection.outlook.com include:spf.itebo.de -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;sp=none;adkim=r;aspf=r;pct=100;rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
mail._domainkey
✓ Public key: 216 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
3 records- brevo-code:dd4eb73ffbc4e64190328f84ddf3507e
- SPFv=spf1 mx ip4:91.249.168.162 include:spf.protection.outlook.com include:spf.itebo.de -all
- MS=ms79699081
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