DNS Report for amazon.science

• ns-1252.awsdns-28.org

  • IPv4: 205.251.196.228
  • IPv6: 2600:9000:5304:e400::1
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• ns-1691.awsdns-19.co.uk

  • IPv4: 205.251.198.155
  • IPv6: 2600:9000:5306:9b00::1
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• ns-415.awsdns-51.com

  • IPv4: 205.251.193.159
  • IPv6: 2600:9000:5301:9f00::1
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• ns-579.awsdns-08.net

  • IPv4: 205.251.194.67
  • IPv6: 2600:9000:5302:4300::1
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• ns-1252.awsdns-28.org

  • Status: Responded
  • IP(s): 108.138.64.56, 108.138.64.113, 108.138.64.12, 108.138.64.108
  • TTL: 60 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• ns-1691.awsdns-19.co.uk

  • Status: Responded
  • IP(s): 108.138.64.12, 108.138.64.108, 108.138.64.113, 108.138.64.56
  • TTL: 60 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• ns-415.awsdns-51.com

  • Status: Responded
  • IP(s): 108.138.64.56, 108.138.64.113, 108.138.64.12, 108.138.64.108
  • TTL: 60 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• ns-579.awsdns-08.net

  • Status: Responded
  • IP(s): 108.138.64.113, 108.138.64.108, 108.138.64.12, 108.138.64.56
  • TTL: 60 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

ns-1252.awsdns-28.org

• Serial: 1
• Refresh: 7200
• Retry: 900
• Expire: 1209600
• Minimum TTL: 86400

ns-1691.awsdns-19.co.uk

• Serial: 1
• Refresh: 7200
• Retry: 900
• Expire: 1209600
• Minimum TTL: 86400

ns-415.awsdns-51.com

• Serial: 1
• Refresh: 7200
• Retry: 900
• Expire: 1209600
• Minimum TTL: 86400

ns-579.awsdns-08.net

• Serial: 1
• Refresh: 7200
• Retry: 900
• Expire: 1209600
• Minimum TTL: 86400

Serial: 1 - OK

REFRESH: 7200 - OK

RETRY: 900 - OK

EXPIRE: 1209600 - OK

MINIMUM TTL: 86400 - Note: Outside recommended range (1-3 hours)

ns-1252.awsdns-28.org

• 10 inbound-smtp.us-east-1.amazonaws.com ( 3.211.210.226 )

ns-1691.awsdns-19.co.uk

• 10 inbound-smtp.us-east-1.amazonaws.com ( 44.210.166.32 )

ns-415.awsdns-51.com

• 10 inbound-smtp.us-east-1.amazonaws.com ( 54.197.5.236 )

ns-579.awsdns-08.net

• 10 inbound-smtp.us-east-1.amazonaws.com ( 44.210.166.32 )

MX Record Consistency - Warning: Inconsistencies found

MX Record Count - Warning: Only one MX record

• 32.166.210.44.in-addr.arpa -> ec2-44-210-166-32.compute-1.amazonaws.com
• 236.5.197.54.in-addr.arpa -> ec2-54-197-5-236.compute-1.amazonaws.com
• 226.210.211.3.in-addr.arpa -> ec2-3-211-210-226.compute-1.amazonaws.com

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 mx ip4:199.255.192.0/22 ip4:199.127.232.0/22 ip4:54.240.0.0/18 ip4:69.169.224.0/20 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:76.223.176.0/20 ip4:54.240.64.0/19 ip4:54.240.96.0/19 ip4:52.82.172.0/22 include:mktomail.com ~all
• SPF Syntax: Failed
• Deprecated Elements: Passed
• IP Addresses: 199.255.192.0/22, 199.127.232.0/22, 54.240.0.0/18, 69.169.224.0/20, 23.249.208.0/20, 23.251.224.0/19, 76.223.176.0/20, 54.240.64.0/19, 54.240.96.0/19, 52.82.172.0/22
• Includes: mktomail.com
• DNS Lookups: 4
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: ~all

Errors:

• SPF record syntax is invalid

• DKIM Records Found: Yes
• Selectors Found: default
• Selector 'default':
  Record: v=DKIM1; p=
• Valid Syntax: No

Warnings:

• DKIM record for selector 'default' may be incomplete

• Record: v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]
• Syntax: Valid
• Policy: reject
• RUA (Aggregate Reports): mailto:[email protected]
• RUF (Forensic Reports): mailto:[email protected]

DMARC External Validation:

• Invalid external domains: dmarc.amazon.com, dmarc.amazon.com

Warnings:

• Some external domains are not properly configured to receive DMARC reports: dmarc.amazon.com, dmarc.amazon.com