Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
fgst.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-25 19:29:38 UTC · ↺ Refresh
MX Hostnames
- mcow01.it4.school
MX Priorities
- mcow01.it4.school: 10
A / AAAA Records
- 81.169.145.175 ↩ waf.rzone.de
- 2a01:238:20a:202:1175:: ↩ waf.rzone.de
Mail Server IPs
- 148.251.5.117 ↩ mcow01.it4.school
SOA Record
Raw SOA
docks16.rzone.de hostmaster.strato-rz.de 2020050835 86400 7200 604800 300
Primary NS (mname)
docks16.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020050835
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
shades20.rzone.de
docks16.rzone.de
SPF Record
✓ Strict (-all)
v=spf1 a:mcow01.it4.school -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; adkim=s; aspf=s;
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
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
1 record- SPFv=spf1 a:mcow01.it4.school -all
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