Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
praha11.cz
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-14 02:28:31 UTC · ↺ Refresh
MX Hostnames
- ax.virusfree.cz
- cx.spamfree.cz
- dx.spamfree.cz
- bx.virusfree.cz
MX Priorities
- ax.virusfree.cz: 12801
- bx.virusfree.cz: 12817
- cx.spamfree.cz: 12833
- dx.spamfree.cz: 12849
A / AAAA Records
- 88.86.100.197 ↩ lbc.as4u.org
- 2a01:28:ca:72::100:197 ↩ lbc.as4u.org
Mail Server IPs
- 31.7.241.24 ↩ ax.virusfree.cz
- 2001:67c:15a1::a1 ↩ ax.virusfree.cz
- 89.187.156.46 ↩ bq.virusfree.cz
- 2001:67c:15a2::b1 ↩ bx.virusfree.cz
- 195.24.76.170 ↩ dq.spamfree.cz
- 2001:67c:15a3::d1 ↩ dx.spamfree.cz
SOA Record
Raw SOA
ns1.websupport.cz admin.websupport.cz 1768405891 7200 2048 1048576 2560
Primary NS (mname)
ns1.websupport.cz
Admin Email (rname)
admin@websupport.cz
Serial
1768405891
Refresh
7200s
Retry
2048s
Expire
1048576s
Minimum TTL
2560s
Nameservers (NS)
ns2.websupport.cz
ns3.websupport.eu
ns1.websupport.cz
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com ip4:193.35.104.122 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict 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
✓ 3 found
selector1._domainkey
selector2._domainkey
default._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- MS=B18BCF20C46F063BEAAB3317E70BA9A4134118FA
- ppe-a0bab8dc9933f7cfd1929338f38245fba5354da3
- facebook-domain-verification=3og37pffbxz4lj2bpaf57m1tt2sek7
- SPFv=spf1 include:spf.protection.outlook.com ip4:193.35.104.122 -all
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