DNS Report for 18.cn

• vip4.alidns.com

  • IPv4: 170.33.80.11, 170.33.32.211, 8.212.93.4, 170.33.73.27, 140.205.1.6, 170.33.40.137
  • IPv6: 2408:4009:500::4
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• vip3.alidns.com

  • IPv4: 8.212.93.3, 170.33.80.10, 170.33.40.136, 170.33.32.210, 170.33.73.26, 140.205.1.5
  • IPv6: 2408:4009:500::3
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• vip4.alidns.com

  • Status: Responded
  • IP(s): 180.163.69.158
  • TTL: 600 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• vip3.alidns.com

  • Status: Responded
  • IP(s): 180.163.69.158
  • TTL: 600 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

vip4.alidns.com

• Serial: 2024083011
• Refresh: 3600
• Retry: 1200
• Expire: 86400
• Minimum TTL: 600

vip3.alidns.com

• Serial: 2024082911
• Refresh: 3600
• Retry: 1200
• Expire: 86400
• Minimum TTL: 600

Serial - Warning: Inconsistent across nameservers

REFRESH: 3600 - OK

RETRY: 1200 - OK

EXPIRE: 86400 - OK

MINIMUM TTL: 600 - Note: Outside recommended range (1-3 hours)

vip4.alidns.com

• 10 mail.18.cn ( 101.89.221.19 )

vip3.alidns.com

• 10 mail.18.cn ( 101.89.221.19 )

MX Record Consistency - OK

MX Record Count - Warning: Only one MX record

• 19.221.89.101.in-addr.arpa -> No PTR record found: The DNS query name does not exist: 19.221.89.101.in-addr.arpa.

PTR Records - OK

• Signed: No
• Validation: Failed
• DNSKEY Records: None
• DS Records in parent zone: None
• DS at Parent: None

DNSSEC - Note: Domain is not signed with DNSSEC

Error: No DNSSEC records found

SPF Record Published: Passed

Multiple SPF Records: Passed

SPF Record 1:

• Record: v=spf1 a mx ip4:101.89.221.19 ip4:101.89.220.1/29 ip4:101.89.220.9/29 ip4:140.207.211.49/29 ip4:140.207.211.57/29 -all
• SPF Syntax: Failed
• Deprecated Elements: Passed
• IP Addresses: 101.89.221.19, 101.89.220.1/29, 101.89.220.9/29, 140.207.211.49/29, 140.207.211.57/29
• Includes:
• DNS Lookups: 3
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: -all

Errors:

• SPF record syntax is invalid

• DKIM Records Found: No

Warnings:

• No DKIM records found for common selectors

• Record: None
• Syntax: Invalid
• Policy: None
• RUA (Aggregate Reports):

DMARC External Validation:

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

Errors:

• DMARC record does not exist