Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
czechtrade.cz
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 04:05:23 UTC · ↺ Refresh
MX Hostnames
- cts3.czechtrade.cz
MX Priorities
- cts3.czechtrade.cz: 0
A / AAAA Records
- 193.86.21.54 (no PTR)
Mail Server IPs
- 193.86.21.235 ↩ cts3.czechtrade.cz
SOA Record
Raw SOA
ns1.websupport.cz admin.websupport.cz 1763649680 7200 2048 1048576 2560
Primary NS (mname)
ns1.websupport.cz
Admin Email (rname)
admin@websupport.cz
Serial
1763649680
Refresh
7200s
Retry
2048s
Expire
1048576s
Minimum TTL
2560s
Nameservers (NS)
ns1.websupport.cz
ns2.websupport.cz
ns3.websupport.eu
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:193.86.21.68 ip4:193.86.21.69 ip4:193.86.21.3 ip4:193.86.21.23 ip4:193.86.21.33 ip4:193.86.21.29 ip4:193.86.21.241 ip4:193.86.21.235 ip4:193.85.215.251 ip4:62.109.140.190 ip4:212.67.71.5 ip4:93.185.102.127 ip4:193.86.21.25 ip4:193.86.21.78 ip4:193.86.21.79 include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ 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
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- KCoc9VLYOatBit90Bd/d7jSTjQyH9th37AyYC7TpUEOUZ9OVUaGA1re9wZz8h5S18Foka1gHywEug4glLIV/5Q==
- l+yx2dQcgE6XMkjpDBbmw1dwC6tbEvohhtqJZ1QYS9792F4G/ANDSqfhXvaxN1sbmhNPX/ifmtD7S1wAZ9+pNQ==
- SPFv=spf1 mx ip4:193.86.21.68 ip4:193.86.21.69 ip4:193.86.21.3 ip4:193.86.21.23 ip4:193.86.21.33 ip4:193.86.21.29 ip4:193.86.21.241 ip4:193.86.21.235 ip4:193.85.215.251 ip4:62.109.140.190 ip4:212.67.71.5 ip4:93.185.102.127 ip4:193.86.21.25 ip4:193.86.21.78 ip4:193.86.21.79 include:spf.protection.outlook.com -all
- _65v1yuzz6w0bn06jessbji44dso99pa
- google-site-verification=SqoyH_48n7P40S8KFqqOz4R5XclOHNwkYLoOE82ikIo
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