ct.heise.de

Valid Email Server
Domain Lookup › ct.heise.de
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
ct.heise.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-04-02 09:24:16 UTC · ↺ Refresh

MX Hostnames

  • mx03.hornetsecurity.com
  • mx02.hornetsecurity.com
  • mx01.hornetsecurity.com
  • mx04.hornetsecurity.com

MX Priorities

  • mx02.hornetsecurity.com: 20
  • mx04.hornetsecurity.com: 40
  • mx01.hornetsecurity.com: 10
  • mx03.hornetsecurity.com: 30

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 94.100.136.8 ↩ mx02.hornetsecurity.com
  • 94.100.136.7 ↩ mx04.hornetsecurity.com
  • 94.100.132.8 ↩ mx01.hornetsecurity.com
  • 94.100.134.8 ↩ mx03.hornetsecurity.com

SOA Record

No SOA record found.

Nameservers (NS)

No nameservers found.

SPF Record

✗ Invalid
v=spf1 ipv6:2a00:e68:14:800::/64 193.99.145.0/24 -all
📊 DNS lookups: 0/10
⚠ Strict -all with no allowed senders — no servers can send email for this domain.

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

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 ipv6:2a00:e68:14:800::/64 193.99.145.0/24 -all
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