DNS Report for centrum.cz

• max.ns.cloudflare.com

  • IPv4: 172.64.33.132, 173.245.59.132, 108.162.193.132
  • IPv6: 2a06:98c1:50::ac40:2184, 2803:f800:50::6ca2:c184, 2606:4700:58::adf5:3b84
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• pam.ns.cloudflare.com

  • IPv4: 172.64.32.138, 173.245.58.138, 108.162.192.138
  • IPv6: 2606:4700:50::adf5:3a8a, 2a06:98c1:50::ac40:208a, 2803:f800:50::6ca2:c08a
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• max.ns.cloudflare.com

  • Status: Responded
  • IP(s): 46.255.231.129
  • TTL: 300 seconds
  • Recursive Queries: Allows recursive queries
  • TCP Connectivity: Allows TCP connections

• pam.ns.cloudflare.com

  • Status: Responded
  • IP(s): 46.255.231.129
  • TTL: 300 seconds
  • Recursive Queries: Allows recursive queries
  • TCP Connectivity: Allows TCP connections

max.ns.cloudflare.com

• Serial: 2349736265
• Refresh: 10000
• Retry: 2400
• Expire: 604800
• Minimum TTL: 1800

pam.ns.cloudflare.com

• Serial: 2349736265
• Refresh: 10000
• Retry: 2400
• Expire: 604800
• Minimum TTL: 1800

Serial: 2349736265 - OK

REFRESH: 10000 - OK

RETRY: 2400 - OK

EXPIRE: 604800 - OK

MINIMUM TTL: 1800 - Note: Outside recommended range (1-3 hours)

max.ns.cloudflare.com

• 10 centrum-cz-10mx1.eco-mx.cz ( 46.255.225.8 )
• 10 centrum-cz-10mx2.eco-mx.cz ( 46.255.227.8 )
• 20 centrum-cz-20mx1.eco-mx.cz ( 46.255.227.8 )
• 20 centrum-cz-20mx2.eco-mx.cz ( 46.255.225.8 )

pam.ns.cloudflare.com

• 10 centrum-cz-10mx1.eco-mx.cz ( 46.255.225.8 )
• 10 centrum-cz-10mx2.eco-mx.cz ( 46.255.227.8 )
• 20 centrum-cz-20mx1.eco-mx.cz ( 46.255.227.8 )
• 20 centrum-cz-20mx2.eco-mx.cz ( 46.255.225.8 )

MX Record Consistency - OK

MX Record Count - OK

• 8.227.255.46.in-addr.arpa -> No PTR record found: The DNS query name does not exist: 8.227.255.46.in-addr.arpa.
• 8.227.255.46.in-addr.arpa -> No PTR record found: The DNS query name does not exist: 8.227.255.46.in-addr.arpa.
• 8.225.255.46.in-addr.arpa -> No PTR record found: The DNS query name does not exist: 8.225.255.46.in-addr.arpa.
• 8.225.255.46.in-addr.arpa -> No PTR record found: The DNS query name does not exist: 8.225.255.46.in-addr.arpa.

PTR Records - OK

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

DNSSEC - Warning: Validation failed

Issue: No DS record found at the parent zone.

Action: Please add the DS record to both your DNS server and domain registrar.

Error: Error checking DNSSEC: Your connection limit exceeded. Please slow down and try again later.

SPF Record Published: Passed

Multiple SPF Records: Passed

SPF Record 1:

• Record: v=spf1 redirect=_spf.centrum.cz
• SPF Syntax: Failed
• Deprecated Elements: Passed
• IP Addresses:
• Includes:
• DNS Lookups: 0
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: Not Present

Warnings:

• SPF record doesn't contain an 'all' mechanism

Errors:

• SPF record syntax is invalid

• DKIM Records Found: Yes
• Selectors Found: mail
• Selector 'mail':
  Record: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCfGs+NT0VvN/a1Dy+seIjjOBB8Y7ML2o61FdeNqvncTNJP75F+bW80iuqC9iJlRA+2NGtU1DPAGTblS4ujr+HWM8kcS2i9yaHMOt31exZhFmz8qrY3oUx9uTgy96sK5fmStqGokK5R0UQIV7zWJUZEVw/CETMkPmPKT3M1tmGd9wIDAQAB
• Valid Syntax: Yes

• Record: v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]
• Syntax: Valid
• Policy: none
• RUA (Aggregate Reports): mailto:[email protected]
• RUF (Forensic Reports): mailto:[email protected]

DMARC External Validation:

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