Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
nef-holding.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 08:28:16 UTC · ↺ Refresh
MX Hostnames
- nefholding-de0i.mail.protection.outlook.com
- mail.nef-holding.de
MX Priorities
- nefholding-de0i.mail.protection.outlook.com: 5
- mail.nef-holding.de: 10
A / AAAA Records
- 92.205.106.183 ↩ 183.106.205.92.host.secureserver.net
Mail Server IPs
- 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca2d::2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 2a01:111:f403:ca2d::1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 2a01:111:f403:ca27:: ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 92.205.106.183 ↩ 183.106.205.92.host.secureserver.net
SOA Record
Raw SOA
srv03.grosys.de service.grosys.de 1741181150 10800 3600 604800 10800
Primary NS (mname)
srv03.grosys.de
Admin Email (rname)
service@grosys.de
Serial
1741181150
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
10800s
Nameservers (NS)
ns01.grosysnet.de
srv03.grosys.de
SPF Record
✓ Strict (-all)
v=spf1 a mx a:srv02.grosys.de include:secureserver.net include:spf.protection.outlook.com include:spf-de.emailsignatures365.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
3 records- apple-domain-verification=s9REjkHldRI4ruI9
- MS=ms30902851
- SPFv=spf1 a mx a:srv02.grosys.de include:secureserver.net include:spf.protection.outlook.com include:spf-de.emailsignatures365.com -all
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