htk.de

Valid Email Server
Domain Lookup › htk.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
htk.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-24 10:10:23 UTC · ↺ Refresh

MX Hostnames

  • htk-de.mail.protection.outlook.com

MX Priorities

  • htk-de.mail.protection.outlook.com: 0

A / AAAA Records

  • 104.21.36.228 (no PTR)
  • 172.67.200.80 (no PTR)
  • 2606:4700:3036::6815:24e4
  • 2606:4700:3031::ac43:c850

Mail Server IPs

  • 52.101.68.18 ↩ mail-db4pr02cu00302.inbound.protection.outlook.com
  • 52.101.73.30 ↩ mail-am7pr05cu00306.inbound.protection.outlook.com
  • 52.101.68.21 ↩ mail-db4pr02cu00205.inbound.protection.outlook.com
  • 52.101.68.39 ↩ mail-db7pr03cu00607.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::c ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::8 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com

SOA Record

Raw SOA carter.ns.cloudflare.com dns.cloudflare.com 2397682802 10000 2400 604800 1800
Primary NS (mname)
carter.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397682802
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

dahlia.ns.cloudflare.com
carter.ns.cloudflare.com

SPF Record

✓ Soft Fail (~all)
v=spf1 a mx ip4:116.202.252.39 ip6:2a01:4f8:d0a:7486::2 include:spf.protection.outlook.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

1 record
  • SPFv=spf1 a mx ip4:116.202.252.39 ip6:2a01:4f8:d0a:7486::2 include:spf.protection.outlook.com ~all
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