Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
grossmann-computer.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 18:17:43 UTC · ↺ Refresh
MX Hostnames
- grossmann-computer.de
MX Priorities
- grossmann-computer.de: 10
A / AAAA Records
- 81.169.135.241 ↩ grossmann-computer.de
Mail Server IPs
- 81.169.135.241 ↩ grossmann-computer.de
SOA Record
Raw SOA
ns3.stratoserver.net hostmaster.strato-rz.de 2020050704 86400 7200 604800 300
Primary NS (mname)
ns3.stratoserver.net
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020050704
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
ns3.stratoserver.net
ns4.stratoserver.net
SPF Record
✓ Strict (-all)
v=spf1 mx -all
📊 DNS lookups: 1/10
✓ 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
✓ 13 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
mail._domainkey
dkim._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
zoho._domainkey
sendgrid._domainkey
mxvault._domainkey
amazonses._domainkey
✓ Public key: 4 chars (valid)
⚠ Public key too short (4 chars) — DKIM may be invalid.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- DMARCv=DMARC1;p=none
- SPFv=spf1 mx -all
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