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DNS Report for seznam.cz

Date Generated: 2024-08-05 03:50:03
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Nameservers

  • ams.seznam.cz
    • IPv4: 77.75.75.230
    • IPv6: 2a02:598:4444::4
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): 30 seconds
    • Recursive: N/A
  • ans.seznam.cz
    • IPv4: 77.75.74.80
    • IPv6: 2a02:598:3333::3
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): 30 seconds
    • Recursive: N/A

Nameserver Count - OK

Nameserver Queries

  • ams.seznam.cz
    • Status: Responded
    • IP(s): 77.75.77.222, 77.75.79.222
    • TTL: 60 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • ans.seznam.cz
    • Status: Responded
    • IP(s): 77.75.77.222, 77.75.79.222
    • TTL: 60 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)

SOA Records

ams.seznam.cz
  • Serial: 1722769329
  • Refresh: 900
  • Retry: 300
  • Expire: 604800
  • Minimum TTL: 300
ans.seznam.cz
  • Serial: 1722769329
  • Refresh: 900
  • Retry: 300
  • Expire: 604800
  • Minimum TTL: 300

Serial: 1722769329 - OK

REFRESH: 900 - OK

RETRY: 300 - OK

EXPIRE: 604800 - OK

MINIMUM TTL: 300 - Note: Outside recommended range (1-3 hours)

MX Records

ams.seznam.cz
ans.seznam.cz

MX Record Consistency - OK

MX Record Count - OK

Reverse MX A records (PTR)

  • 90.77.75.77.in-addr.arpa -> mx1.seznam.cz
  • 42.77.75.77.in-addr.arpa -> mx2.seznam.cz

PTR Records - OK

DNSSEC

DNSSEC Inspector
  • Signed: Yes
  • Validation: Successful
  • DNSKEY Records: 2
  • DS Records in parent zone: 0
  • DS at Parent: None

DNSSEC - OK

SPF (Sender Policy Framework)

SPF Record Published: Passed

Multiple SPF Records: Passed

SPF Record 1:
  • Record: v=spf1 mx ip4:77.75.78.0/23 ip4:77.75.76.0/23 ip6:2a02:598::/32 ?all
  • SPF Syntax: Failed
  • Deprecated Elements: Passed
  • IP Addresses: 77.75.78.0/23, 77.75.76.0/23, 2a02:598::/32
  • Includes:
  • DNS Lookups: 3
  • Void Lookups: Passed
  • Escaping Chars: Not Present
  • All Mechanism: ?all
Errors:
  • SPF record syntax is invalid

DKIM (DomainKeys Identified Mail)

  • DKIM Records Found: No
Warnings:
  • No DKIM records found for common selectors

DMARC

DMARC External Validation:
  • All external domains in your DMARC record are giving permission to send them DMARC reports.
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