DNS Report for 17u.cn

• ns2.dnsv5.com

  • IPv4: 112.80.181.106, 1.12.0.16, 1.12.14.19, 183.47.126.155, 1.12.0.19, 106.55.82.76, 52.198.159.146, 117.89.178.200
  • IPv6: No IPv6 found
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): N/A seconds
  • Recursive: N/A

• ns1.dnsv5.com

  • IPv4: 125.94.59.200, 1.12.0.20, 1.12.0.17, 1.12.14.18, 18.194.2.137, 1.12.0.18, 163.177.5.75, 52.220.136.67, 36.155.149.211
  • IPv6: No IPv6 found
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): N/A seconds
  • Recursive: N/A

Nameserver Count - OK

• ns2.dnsv5.com

  • Status: Responded
  • IP(s): 202.90.20.133
  • TTL: 100 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• ns1.dnsv5.com

  • Status: Responded
  • IP(s): 202.90.20.133
  • TTL: 100 seconds
  • Recursive Queries: Unclear (Response code: NXDOMAIN)
  • TCP Connectivity: TCP connection failed (Response code: NXDOMAIN)

ns2.dnsv5.com

• Serial: 1723099287
• Refresh: 3600
• Retry: 180
• Expire: 1209600
• Minimum TTL: 180

ns1.dnsv5.com

• Serial: 1723099287
• Refresh: 3600
• Retry: 180
• Expire: 1209600
• Minimum TTL: 180

Serial: 1723099287 - OK

REFRESH: 3600 - OK

RETRY: 180 - OK

EXPIRE: 1209600 - OK

MINIMUM TTL: 180 - Note: Outside recommended range (1-3 hours)

ns2.dnsv5.com

• 5 mailmx2.ly.com ( 8.219.152.31 )
• 10 mailmx4.ly.com ( 47.74.223.162 )
• 15 mailmx3.ly.com ( 206.189.7.78 )
• 20 mailmx1.ly.com ( 8.219.223.136 )

ns1.dnsv5.com

• 5 mailmx2.ly.com ( 8.219.152.31 )
• 10 mailmx4.ly.com ( 47.74.38.91 )
• 15 mailmx3.ly.com ( 206.189.7.78 )
• 20 mailmx1.ly.com ( 8.219.223.136 )

MX Record Consistency - Warning: Inconsistencies found

MX Record Count - OK

• 136.223.219.8.in-addr.arpa -> sal704.corpsmtp.net
• 78.7.189.206.in-addr.arpa -> inbound-protection-606.corpsmtp.net
• 91.38.74.47.in-addr.arpa -> sal701.corpsmtp.net
• 31.152.219.8.in-addr.arpa -> sal703.corpsmtp.net
• 162.223.74.47.in-addr.arpa -> sal605.corpsmtp.net

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 include:spf.mail.17u.cn ~all
• SPF Syntax: Passed
• Deprecated Elements: Passed
• IP Addresses:
• Includes: spf.mail.17u.cn
• DNS Lookups: 3
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: ~all

• 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:

• No DMARC record found