cog.de

Valid Email Server
Domain Lookup › cog.de

Domain Overview

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

Checked via [email protected] · 2026-04-03 12:48:56 UTC · ↺ Refresh

MX Hostnames

  • mx1867.cog.de

MX Priorities

  • mx1867.cog.de: 10

A / AAAA Records

  • 212.223.139.1 ↩ cog.de

Mail Server IPs

  • 217.7.11.37 ↩ mx1867.cog.de

SOA Record

Raw SOA ns12.nameserver.de dnsmaster.ns12.nameserver.de 2026020601 10000 1800 604800 3600
Primary NS (mname)
ns12.nameserver.de
Admin Email (rname)
dnsmaster@ns12.nameserver.de
Serial
2026020601
Refresh
10000s
Retry
1800s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns11.nameserver.de
ns12.nameserver.de

SPF Record

✓ Soft Fail (~all)
v=spf1 a mx include:spf.crsend.com include:_spf.senders.scnem.com include:spf.clustermail.de include:spf.protection.outlook.com include:mailgun.org include:spf-de.emailsignatures365.com ip4:217.7.11.37 ~all
📊 DNS lookups: 8/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; pct=100; fo=1; ri=3600; adkim=r; aspf=r; rua=mailto:[email protected],mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected],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

4 records
  • apple-domain-verification=MvKFcySaPJQsRofl
  • MS=A90CC0EAF12FEC89BB1CABD78AAA478EB778F76A
  • SPFv=spf1 a mx include:spf.crsend.com include:_spf.senders.scnem.com include:spf.clustermail.de include:spf.protection.outlook.com include:mailgun.org include:spf-de.emailsignatures365.com ip4:217.7.11.37 ~all
  • MS=ms16655131
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