Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
optiker-richter.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 07:43:08 UTC · ↺ Refresh
MX Hostnames
- mail.redcat-media.com
MX Priorities
- mail.redcat-media.com: 10
A / AAAA Records
- 188.68.39.166 ↩ mx.redcat-media.de
Mail Server IPs
- 27.123.244.33 ↩ mail.redcat-media.com
- 2a0a:51c1:a:9a::1 ↩ mail.redcat-media.com
SOA Record
Raw SOA
hydrogen.ns.hetzner.com dns.hetzner.com 2025111100 86400 10800 3600000 3600
Primary NS (mname)
hydrogen.ns.hetzner.com
Admin Email (rname)
dns@hetzner.com
Serial
2025111100
Refresh
86400s
Retry
10800s
Expire
3600000s
Minimum TTL
3600s
Nameservers (NS)
hydrogen.ns.hetzner.com
oxygen.ns.hetzner.com
helium.ns.hetzner.de
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:27.123.244.33 ip6:2a0a:51c1:a:9a::1 -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; pct=100; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; ri=86400; aspf=s; adkim=s; fo=1
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: reject
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
2 records- SPFv=spf1 a mx ip4:27.123.244.33 ip6:2a0a:51c1:a:9a::1 -all
- brevo-code:1cd9b0e9262cbc7e0dfd04bdbcfcbce8
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