Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
buk.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-19 12:18:33 UTC · ↺ Refresh
MX Hostnames
- smail-buk.dts-security.de
MX Priorities
- smail-buk.dts-security.de: 5
A / AAAA Records
- 178.63.68.96 ↩ zucker.schokokeks.org
- 2a01:4f8:121:1ffe:1:1827::1913 (no PTR)
Mail Server IPs
- 84.201.116.89 ↩ smail-buk.dts-security.de
SOA Record
Raw SOA
ns5.kasserver.com hostmaster.kasserver.com 2602091721 28800 7200 1209600 7200
Primary NS (mname)
ns5.kasserver.com
Admin Email (rname)
hostmaster@kasserver.com
Serial
2602091721
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
7200s
Nameservers (NS)
ns5.kasserver.com
ns6.kasserver.com
SPF Record
✓ Strict (-all)
v=spf1 mx a:mail.beckerundkries.de include:spf.protection.outlook.com include:spf1.dts-security.de include:spf-de.emailsignatures365.com include:spf.crsend.com include:spf.sendinblue.com include:_spf.aareon.com ip4:78.138.64.227 ip4:213.221.96.251 -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement
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
✓ 2 found
mail._domainkey
dkim._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
7 records- teamviewer-sso-verification=b84aea7fb2dc4f34a0e097440958e2c1
- bw=nAZxdaJ4OU0EvuFRboeJv9gHR0qhElghyUBzk9na3mPQ
- MS=ms60110310
- _globalsign-domain-verification=BfZvyNT6hWnS6VNVyTAuuB7NOrorK3GjebaUP640RT
- sendinblue-code:1e15ac3933c0ec952623f16d22fcfa92
- apple-domain-verification=2zqPvcZ8VLtyJfzr
- SPFv=spf1 mx a:mail.beckerundkries.de include:spf.protection.outlook.com include:spf1.dts-security.de include:spf-de.emailsignatures365.com include:spf.crsend.com include:spf.sendinblue.com include:_spf.aareon.com ip4:78.138.64.227 ip4:213.221.96.251 -all
Full email verification for buk.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits