SPF Record Checker

Please enter a host name to check.

Example host names with SPF records:
ipswitch.com, microsoft.com, google.com, gmail.com, apple.com, postini.com, ebay.com, orange.ch, bitcointalk.org, thecannells.org, facebook.com, shaw.ca, ubs.com, kitterman.com

SPF checker created by an author of the SPF RFC4408.
http://www.kitterman.com/spf/validate.html

 

The following nameservers for the host name outlook.de were found.
ns1-38.azure-dns.com
ns2-38.azure-dns.net
ns3-38.azure-dns.org
ns4-38.azure-dns.info

The following rules for the host name outlook.de were found. A total of 5 queries (as defined by RFC4408) were performed for fetching SPF and related records.
The DNS lookups for SPF took 836msec.
  1. Inlcude 13 allow rules from host spf-a.hotmail.com.
    1. Allow all from the range 157.55.0.192/26 (157.55.0.192 - 157.55.0.255)
    2. Allow all from the range 157.55.1.128/26 (157.55.1.128 - 157.55.1.191)
    3. Allow all from the range 157.55.2.0/25 (157.55.2.0 - 157.55.2.127)
    4. Allow all from the range 65.54.190.0/24 (65.54.190.0 - 65.54.190.255)
    5. Allow all from the range 65.54.51.64/26 (65.54.51.64 - 65.54.51.127)
    6. Allow all from the range 65.54.61.64/26 (65.54.61.64 - 65.54.61.127)
    7. Allow all from the range 65.55.111.0/24 (65.55.111.0 - 65.55.111.255)
    8. Allow all from the range 65.55.116.0/25 (65.55.116.0 - 65.55.116.127)
    9. Allow all from the range 65.55.34.0/24 (65.55.34.0 - 65.55.34.255)
    10. Allow all from the range 65.55.90.0/24 (65.55.90.0 - 65.55.90.255)
    11. Allow all from the range 65.54.241.0/24 (65.54.241.0 - 65.54.241.255)
    12. Allow all from the range 207.46.117.0/24 (207.46.117.0 - 207.46.117.255)
    13. Soft deny all IPs which do not match any previous rule
  2. Inlcude 13 allow rules from host spf-b.hotmail.com.
    1. Allow all from the range 52.103.0.0/17 (52.103.0.0 - 52.103.127.255)
    2. Allow all from the range 104.47.0.0/17 (104.47.0.0 - 104.47.127.255)
    3. Allow all from the range 40.92.0.0/16 (40.92.0.0 - 40.92.255.255)
    4. Allow all from the range 104.47.20.0/23 (104.47.20.0 - 104.47.21.255)
    5. Allow all from the range 104.47.108.0/23 (104.47.108.0 - 104.47.109.255)
    6. Allow all from the range 104.47.75.0/24 (104.47.75.0 - 104.47.75.255)
    7. Allow all from the range 104.47.53.50/24 (104.47.53.50 - 104.47.53.255)
    8. Allow all from the range 2a01:111:f400::/48
    9. Allow all from the range 2a01:111:f403::/49
    10. Allow all from the range 2a01:111:f403:8000::/50
    11. Allow all from the range 2a01:111:f403:c000::/51
    12. Allow all from the range 2a01:111:f403:f000::/52
    13. Deny all IPs which do not match any previous rule
  3. Inlcude 1 allow rules from host spf-c.hotmail.com.
    1. Soft deny all IPs which do not match any previous rule
  4. Inlcude 1 allow rules from host spf-d.hotmail.com.
    1. Soft deny all IPs which do not match any previous rule
  5. Inlcude 12 allow rules from host spf.protection.outlook.com.
    1. Allow all from the range 40.92.0.0/15 (40.92.0.0 - 40.93.255.255)
    2. Allow all from the range 40.107.0.0/16 (40.107.0.0 - 40.107.255.255)
    3. Allow all from the range 52.100.0.0/15 (52.100.0.0 - 52.101.255.255)
    4. Allow all from the range 52.102.0.0/16 (52.102.0.0 - 52.102.255.255)
    5. Allow all from the range 52.103.0.0/17 (52.103.0.0 - 52.103.127.255)
    6. Allow all from the range 104.47.0.0/17 (104.47.0.0 - 104.47.127.255)
    7. Allow all from the range 2a01:111:f400::/48
    8. Allow all from the range 2a01:111:f403::/49
    9. Allow all from the range 2a01:111:f403:8000::/51
    10. Allow all from the range 2a01:111:f403:c000::/51
    11. Allow all from the range 2a01:111:f403:f000::/52
    12. Deny all IPs which do not match any previous rule
  6. Soft deny all IPs which do not match any previous rule