Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
halder.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-24 18:25:59 UTC · ↺ Refresh
MX Hostnames
- halder-de.mail.protection.outlook.com
MX Priorities
- halder-de.mail.protection.outlook.com: 10
A / AAAA Records
- 185.110.152.174 ↩ production.infolox.tools
Mail Server IPs
- 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
- 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
- 52.101.73.1 ↩ mail-am3pr04cu00501.inbound.protection.outlook.com
- 52.101.73.6 ↩ mail-am6pr04cu00306.inbound.protection.outlook.com
- 2a01:111:f403:ca09::e ↩ mail-am7pr05cu00206.inbound.protection.outlook.com
- 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:ca04:: ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
SOA Record
Raw SOA
docks20.rzone.de hostmaster.strato-rz.de 2020052255 86400 7200 604800 300
Primary NS (mname)
docks20.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020052255
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
docks20.rzone.de
shades02.rzone.de
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:185.110.152.166 ip4:91.26.46.85 ip4:80.149.245.3 ip4:37.24.206.226 include:spf.protection.outlook.com include:_spf.psm.knowbe4.com include:spf.exclaimer.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
4 records- SPFv=spf1 mx ip4:185.110.152.166 ip4:91.26.46.85 ip4:80.149.245.3 ip4:37.24.206.226 include:spf.protection.outlook.com include:_spf.psm.knowbe4.com include:spf.exclaimer.net -all
- brevo-code:01bd87b3c5a0d54ebf75b586e3646cdb
- MS=ms14896669
- sophos-domain-verification=5f1e4370a9a3549720df7a23fd97a8cf72a324fd
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