Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
koebig.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 11:23:55 UTC · ↺ Refresh
MX Hostnames
- securemail.koebig.de
MX Priorities
- securemail.koebig.de: 10
A / AAAA Records
- 212.227.9.87 ↩ kembase.de
Mail Server IPs
- 217.146.153.90 ↩ securemail.koebig.de
SOA Record
Raw SOA
ns6.indis.de hostmaster.indis.de 2026031000 10800 3600 604800 38400
Primary NS (mname)
ns6.indis.de
Admin Email (rname)
hostmaster@indis.de
Serial
2026031000
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
38400s
Nameservers (NS)
ns5.indis.de
ns6.indis.de
SPF Record
✓ Strict (-all)
v=spf1 a mx a:securemail.koebig.de a:ts1.sct.de ip4:212.227.9.87 ip4:94.135.235.188 ip4:217.146.153.80/28 ip4:213.139.135.6 ip4:81.18.104.20 include:sendinblue.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict 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
✓ 1 found
mail._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- SPFv=spf1 a mx a:securemail.koebig.de a:ts1.sct.de ip4:212.227.9.87 ip4:94.135.235.188 ip4:217.146.153.80/28 ip4:213.139.135.6 ip4:81.18.104.20 include:sendinblue.com -all
- swisssign-check=qnk1IHrsObWbV9FdhnedLZbMLlw
- MS=7D57C07AE6BCFA755DF34AC25C5DB5F75CF2E6A4
- brevo-code:c7ab965800a6403de8cec78a47cbc277
- apple-domain-verification=vqmBQSaeeJskMkjp
Full email verification for koebig.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits