Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sons.cz
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-14 06:35:32 UTC · ↺ Refresh
MX Hostnames
- sons-cz.mail.protection.outlook.com
MX Priorities
- sons-cz.mail.protection.outlook.com: 0
A / AAAA Records
- 194.108.117.44 ↩ smeagol.braillnet.cz
Mail Server IPs
- 52.101.68.21 ↩ mail-db4pr02cu00205.inbound.protection.outlook.com
- 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 52.101.73.6 ↩ mail-am6pr04cu00306.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:ca09::1 ↩ mail-as9pr07cu00301.inbound.protection.outlook.com
- 2a01:111:f403:ca09::8 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca04::4 ↩ mail-db4pr02cu00204.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
SOA Record
Raw SOA
ns.braillnet.cz hostmaster.braillnet.cz 2025021829 30 7200 1209600 30
Primary NS (mname)
ns.braillnet.cz
Admin Email (rname)
hostmaster@braillnet.cz
Serial
2025021829
Refresh
30s
Retry
7200s
Expire
1209600s
Minimum TTL
30s
Nameservers (NS)
ns2.gts.cz
ns.braillnet.cz
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com a:mail.braillnet.cz a:smeagol.braillnet.cz a:mspool.gts.cz mx -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;pct=100;rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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
3 records- SPFv=spf1 include:spf.protection.outlook.com a:mail.braillnet.cz a:smeagol.braillnet.cz a:mspool.gts.cz mx -all
- google-site-verification=UeTm4dc2_VfKTSyy-vHbktbdOL9fDCG_SpXLuUxDU6I
- MS=ms79107648
Full email verification for sons.cz
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