mul-ct.de

Valid Email Server
Domain Lookup › mul-ct.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
mul-ct.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-27 13:12:56 UTC · ↺ Refresh

MX Hostnames

  • ctk-mail02.donotspam.de
  • ctk-mail01.donotspam.de

MX Priorities

  • ctk-mail01.donotspam.de: 100
  • ctk-mail02.donotspam.de: 200

A / AAAA Records

  • 142.132.244.173 ↩ static.173.244.132.142.clients.your-server.de

Mail Server IPs

  • 212.18.1.58 ↩ ctk-mail01.donotspam.de
  • 212.18.21.84 ↩ ctk-mail02.donotspam.de

SOA Record

Raw SOA sec1.rcode0.net rcodezero-soa.ipcom.at 2026032501 10800 3600 604800 30
Primary NS (mname)
sec1.rcode0.net
Admin Email (rname)
rcodezero-soa@ipcom.at
Serial
2026032501
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
30s

Nameservers (NS)

sec2.rcode0.net
sec1.rcode0.net

SPF Record

✓ Strict (-all)
v=spf1 a mx ip4:212.111.231.0/27 ip4:212.111.231.224/28 ip4:85.190.183.226/32 ip4:85.190.183.224/32 ip4:85.190.183.225/32 a:mx01.rexx-systems.de include:_spf.donotspam.de -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1;p=none;sp=quarantine;adkim=r;aspf=r;pct=10;rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
⚠ Policy applies to 10% of failing messages only

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

4 records
  • SPFv=spf1 a mx ip4:212.111.231.0/27 ip4:212.111.231.224/28 ip4:85.190.183.226/32 ip4:85.190.183.224/32 ip4:85.190.183.225/32 a:mx01.rexx-systems.de include:_spf.donotspam.de -all
  • cisco-ci-domain-verification=4ef6dd62434891fe58c83504b196b2a7b65e9b6993e76824cb64a5d28cc06b09
  • apple-domain-verification=tJJfwouJtGaVIRVT
  • MS=ms74017816
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