Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mzcr.cz
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-14 04:43:26 UTC · ↺ Refresh
MX Hostnames
- mzcr-cz.k-v1.mx.microsoft
MX Priorities
- mzcr-cz.k-v1.mx.microsoft: 10
A / AAAA Records
- 20.8.203.138 (no PTR)
Mail Server IPs
- 52.101.73.6 ↩ mail-am6pr04cu00306.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 52.101.68.8 ↩ mail-du0pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
- 2a01:111:f403:ca04:: ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::5 ↩ mail-am1pr04cu00105.inbound.protection.outlook.com
SOA Record
Raw SOA
kasel.mzcr.cz hostmaster.mzcr.cz 2026031304 43200 7200 1800000 86400
Primary NS (mname)
kasel.mzcr.cz
Admin Email (rname)
hostmaster@mzcr.cz
Serial
2026031304
Refresh
43200s
Retry
7200s
Expire
1800000s
Minimum TTL
86400s
Nameservers (NS)
kasel.mzcr.cz
migrena.kcict.cz
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:193.84.7.72/29 ip4:193.84.7.70 ip4:193.16.104.16 ip4:193.16.104.17 ip4:20.8.203.138 ip6:2603:1020:201:f::114 a:angina.mzcr.cz include:spf.protection.outlook.com include:u20723476.wl227.sendgrid.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; adkim=r; aspf=r; pct=100; rf=afrf; ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
mail._domainkey
s1._domainkey
s2._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
14 records- g1srq04nxtvsmp27s6t4g2jgmr3nm460
- j5pnywhsv1np4z0p7kyb9gqfgstdv2xr
- 6tznyxll4spwzlplj8j2lyh2lbdf380l
- cisco-ci-domain-verification=1c4bdf6e97e966770a5974b559ad563297 57977a8b5e662510d5fa4c7fb3e169
- tbsr0dkr7jm4h1785tn08kyvp1m9hn58
- _h6bup97jk9rimnpzu0uval1wz8wiq5f
- hpy5w1dtsnl5zyjyfbcj2b9y5y77y71m
- _ltbdyt3g0grt8dk9e1xr6fm3a82tosz
- _w39kihgl1lt8rynsisty9fxdblu7mbv
- SPFv=spf1 mx ip4:193.84.7.72/29 ip4:193.84.7.70 ip4:193.16.104.16 ip4:193.16.104.17 ip4:20.8.203.138 ip6:2603:1020:201:f::114 a:angina.mzcr.cz include:spf.protection.outlook.com include:u20723476.wl227.sendgrid.net -all
- atlassian-domain-verification=QAopa4vukt6aLuX5p0WyxEhJDUb6tplMpVfAuOvHakS9JD0rhGgV3KovNqe5/FNy
- 3hxnhnw4wf84p772d4261nfydjp86433
- 43mv4bwlj96tqqwg0wr3rg7c8ty8txn6
- XnD1xdSmh4QgIgC3w8jX7HeZP5MRWXTOIKlwgj4KrrQ3SZXcGnrc2oMGlVDfa2s oTbkBKyJEziX5YjyUVeFYdA==
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