Domain Overview
DNS: ✓ 20d ago
Checker: ✓ 20d ago
helfferich.nl
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 06:49:53 UTC · ↺ Refresh
MX Hostnames
- helfferich-nl.mail.protection.outlook.com
MX Priorities
- helfferich-nl.mail.protection.outlook.com: 0
A / AAAA Records
- 142.93.227.150 (no PTR)
Mail Server IPs
- 52.101.73.24 ↩ mail-as8pr05cu00300.inbound.protection.outlook.com
- 52.101.73.26 ↩ mail-as9pr05cu01302.inbound.protection.outlook.com
- 52.101.73.19 ↩ mail-as8pr04cu00803.inbound.protection.outlook.com
- 52.101.73.15 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.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:ca04::d ↩ mail-db6pr03cu00105.inbound.protection.outlook.com
SOA Record
Raw SOA
ns0.nl hostmaster.ns0.nl 2022120501 86400 1800 2419200 300
Primary NS (mname)
ns0.nl
Admin Email (rname)
hostmaster@ns0.nl
Serial
2022120501
Refresh
86400s
Retry
1800s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns0.nl
ns11.net
ns5.be
SPF Record
✓ Strict (-all)
v=spf1 a include:spf.protection.outlook.com include:smtpsender.nl ip4:176.56.239.176 include:spf.mailservice.snelstart.nl ip4:93.117.224.154 -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; pct=100; aspf=s; adkim=s; ri=86400; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
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
1 record- SPFv=spf1 a include:spf.protection.outlook.com include:smtpsender.nl ip4:176.56.239.176 include:spf.mailservice.snelstart.nl ip4:93.117.224.154 -all
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