Domain Overview
DNS: ✓ just now
Checker: ✓ just now
schwerkraftlabor.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-09-04 18:34:32 UTC · ↺ Refresh
MX Hostnames
- mail.jan.su
MX Priorities
- mail.jan.su: 0
A / AAAA Records
- 176.96.139.246 ↩ skl6.schwerkraftlabor.de
- 2a0d:5940:8:5b::e959 (no PTR)
Mail Server IPs
- 176.96.139.246 ↩ skl6.schwerkraftlabor.de
- 2a0d:5940:8:5b::e957 (no PTR)
SOA Record
Raw SOA
root-dns.netcup.net dnsadmin.netcup.net 2026042144 28800 7200 1209600 86400
Primary NS (mname)
root-dns.netcup.net
Admin Email (rname)
dnsadmin@netcup.net
Serial
2026042144
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
third-dns.netcup.net
second-dns.netcup.net
root-dns.netcup.net
SPF Record
✓ Soft Fail (~all)
v=spf1 mx a:mail.jan.su ip4:176.96.139.246 ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
dkim._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: dkim
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 mx a:mail.jan.su ip4:176.96.139.246 ~all
- keybase-site-verification=uYQNc0py_6iGJoByhCqmNuhCb6sNvg69PZpAMLgywpM
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