Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ostermann-gruppe.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 06:55:08 UTC · ↺ Refresh
MX Hostnames
- ostermanngruppe-de02c.mail.protection.outlook.com
MX Priorities
- ostermanngruppe-de02c.mail.protection.outlook.com: 0
A / AAAA Records
- 202.61.232.223 ↩ ae8df.netcup.net
Mail Server IPs
- 52.101.73.28 ↩ mail-am7pr05cu00204.inbound.protection.outlook.com
- 52.101.68.36 ↩ mail-db5pr02cu00104.inbound.protection.outlook.com
- 52.101.73.22 ↩ mail-am7pr05cu00106.inbound.protection.outlook.com
- 52.101.73.15 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
- 2a01:111:f403:ca09::f ↩ mail-am7pr05cu00307.inbound.protection.outlook.com
- 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:ca09::9 ↩ mail-as8pr04cu00801.inbound.protection.outlook.com
- 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1104.ui-dns.org hostmaster.1und1.de 2016043094 28800 7200 604800 300
Primary NS (mname)
ns1104.ui-dns.org
Admin Email (rname)
hostmaster@1und1.de
Serial
2016043094
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns1104.ui-dns.com
ns1104.ui-dns.de
ns1104.ui-dns.biz
ns1104.ui-dns.org
SPF Record
✓ Strict (-all)
v=spf1 ip4:91.26.225.242 ip4:91.26.225.226 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;pct=100
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
4 records- sophos-domain-verification=d4cadf882774fa71593178b6a676c850bf5736e6
- MS=ms77058368
- SPFv=spf1 ip4:91.26.225.242 ip4:91.26.225.226 include:spf.protection.outlook.com -all
- apple-domain-verification=hdFMO0Kxd7kkAmXc
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