Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
centrum.cz
Yes
✓ Yes
Unknown
No
Yes
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 20:08:33 UTC · ↺ Refresh
MX Hostnames
- centrum-cz-10mx2.eco-mx.cz
- centrum-cz-20mx1.eco-mx.cz
- centrum-cz-20mx2.eco-mx.cz
- centrum-cz-10mx1.eco-mx.cz
MX Priorities
- centrum-cz-20mx1.eco-mx.cz: 20
- centrum-cz-20mx2.eco-mx.cz: 20
- centrum-cz-10mx1.eco-mx.cz: 10
- centrum-cz-10mx2.eco-mx.cz: 10
A / AAAA Records
- 46.255.231.129 ↩ static-redir.v.eint.cz
- 2a00:da80:e::129 ↩ denikinsider.cz
Mail Server IPs
- 46.255.227.8 (no PTR)
- 46.255.225.8 (no PTR)
SOA Record
Raw SOA
max.ns.cloudflare.com dns.cloudflare.com 2398822633 10000 2400 604800 1800
Primary NS (mname)
max.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398822633
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
max.ns.cloudflare.com
pam.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 redirect=_spf.centrum.cz
📊 DNS lookups: 1/10
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
mail._domainkey
s1._domainkey
s2._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
5 records- google-site-verification=q6tA5OYkNydQyUnQ63ncTNYRw0rLgXO2ASHL9BwgA4w
- google-site-verification=uOQOS8Qfjty5hHS3I9DCL5P_t11ujP4VVpi9bjvBxao
- SPFv=spf1 redirect=_spf.centrum.cz
- amazonses:zhwnMMKwePHOMKAE378OO5hqbD1h+VXiQvh7TgZFkQc=
- google-site-verification=MEKZYb6k-z494g7Hs87mlSjL71DkzAiQve-iZuM6a7U
Full email verification for centrum.cz
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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