ctt.de

Valid Email Server
Domain Lookup › ctt.de

Domain Overview

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

Checked via [email protected] · 2026-03-31 07:43:33 UTC · ↺ Refresh

MX Hostnames

  • mxtls.expurgate.net

MX Priorities

  • mxtls.expurgate.net: 10

A / AAAA Records

  • 104.26.4.21
  • 104.26.5.21
  • 172.67.68.46
  • 2606:4700:20::ac43:442e
  • 2606:4700:20::681a:415
  • 2606:4700:20::681a:515

Mail Server IPs

  • 194.145.224.121 ↩ mxtls.expurgate.net
  • 194.145.224.122 ↩ mxtls.expurgate.net
  • 194.145.224.123 ↩ mxtls.expurgate.net
  • 194.145.224.124 ↩ mxtls.expurgate.net
  • 194.145.224.125 ↩ mxtls.expurgate.net
  • 195.190.135.120 ↩ mxtls.expurgate.net
  • 195.190.135.121 ↩ mxtls.expurgate.net
  • 195.190.135.122 ↩ mxtls.expurgate.net
  • 195.190.135.123 ↩ mxtls.expurgate.net
  • 195.190.135.124 ↩ mxtls.expurgate.net
  • 195.190.135.125
  • 194.145.224.120

SOA Record

Raw SOA eoin.ns.cloudflare.com dns.cloudflare.com 2399854038 10000 2400 604800 1800
Primary NS (mname)
eoin.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399854038
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

eoin.ns.cloudflare.com
haley.ns.cloudflare.com

SPF Record

✓ Soft Fail (~all)
v=spf1 +ip4:185.147.218.11 +include:_spf.expurgate.net +include:spf.crsend.com +include:spf.protection.outlook.com +ip4:88.217.144.99/29 +ip4:193.149.45.64/26 +ip4:193.149.37.88/29 +ip4:78.46.171.234/32 +ip4:148.251.69.35/32 +ip4:91.198.224.13/32 +ip4:157.90.234.36/32 +ip4:116.203.29.129 +mx ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

4 records
  • google-site-verification=t49mPeNOYlRIL9oLCMKAy5pggCa4Tg6N0voWIKxF_i0
  • SPFv=spf1 +ip4:185.147.218.11 +include:_spf.expurgate.net +include:spf.crsend.com +include:spf.protection.outlook.com +ip4:88.217.144.99/29 +ip4:193.149.45.64/26 +ip4:193.149.37.88/29 +ip4:78.46.171.234/32 +ip4:148.251.69.35/32 +ip4:91.198.224.13/32 +ip4:157.90.234.36/32 +ip4:116.203.29.129 +mx ~all
  • MS=3A781C8C9CA6087BA652DF2B0DC2507BAB9CD446
  • MS=ms99436115
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