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, okinawatimes.co.jp, 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 were found for the hostname microsoft.com.
ns3.msft.net [ns3.msft.net]
ns1.msft.net [ns1.msft.net]
ns2.msft.net [ns2.msft.net]
ns4.msft.net [ns4.msft.net]

The SPF entries includes at least one CNAME which is known to cause problems on some mail servers.


The following rules for the host name microsoft.com were found. A total of 10 queries (as defined by RFC4408) were performed for fetching SPF and related records.
The DNS lookups for SPF took 4439msec.
  1. Inlcude 12 allow rules from host _spf-a.microsoft.com.
    1. Allow all from the ip 216.99.5.67
    2. Allow all from the ip 216.99.5.68
    3. Allow all from the ip 202.177.148.100
    4. Allow all from the ip 203.122.32.250
    5. Allow all from the ip 202.177.148.110
    6. Allow all from the ip 213.199.128.139
    7. Allow all from the ip 213.199.128.145
    8. Allow all from the ip 207.46.50.72
    9. Allow all from the ip 207.46.50.82
    10. Allow all from the range 65.55.42.224/28
    11. Inlcude 10 allow rules from host spf.protection.outlook.com.
      1. Allow all from the range 207.46.100.0/24
      2. Allow all from the range 207.46.163.0/24
      3. Allow all from the range 65.55.169.0/24
      4. Allow all from the range 157.56.110.0/23
      5. Allow all from the range 157.55.234.0/24
      6. Allow all from the range 213.199.154.0/24
      7. Allow all from the range 213.199.180.128/26
      8. Allow all from the range 52.100.0.0/14
      9. Inlcude 9 allow rules from host spfa.protection.outlook.com.
        1. Allow all from the range 157.56.112.0/24
        2. Allow all from the range 207.46.51.64/26
        3. Allow all from the range 64.4.22.64/26
        4. Allow all from the range 40.92.0.0/15
        5. Allow all from the range 40.107.0.0/16
        6. Allow all from the range 134.170.140.0/24
        7. Inlcude 11 allow rules from host spfb.protection.outlook.com.
          1. Allow all from the range 2a01:111:f400::/48
          2. Allow all from the range 23.103.128.0/19
          3. Allow all from the range 23.103.198.0/23
          4. Allow all from the range 65.55.88.0/24
          5. Allow all from the range 104.47.0.0/17
          6. Allow all from the range 23.103.200.0/21
          7. Allow all from the range 23.103.208.0/21
          8. Allow all from the range 23.103.191.0/24
          9. Allow all from the range 216.32.180.0/23
          10. Allow all from the range 94.245.120.64/26
          11. Deny all IPs which do not match any previous rule
        8. Allow all from the range 2001:489a:2202::/48
        9. Deny all IPs which do not match any previous rule
      10. Deny all IPs which do not match any previous rule
    12. Soft deny all IPs which do not match any previous rule
  2. Inlcude 11 allow rules from host _spf-b.microsoft.com.
    1. Inlcude 10 allow rules from host _spf-mdm.microsoft.com.
      1. Allow all from the range 134.170.113.0/26
      2. Allow all from the range 131.253.30.0/24
      3. Allow all from the range 157.56.120.128/26
      4. Allow all from the range 134.170.174.0/24
      5. Allow all from the range 134.170.141.64/26
      6. Allow all from the range 134.170.143.0/24
      7. Allow all from the ip 157.58.249.3
      8. Allow all from the ip 65.55.29.77
      9. Allow all from the range 131.253.121.0/26
      10. Deny all IPs which do not match any previous rule
    2. Allow all from the ip 207.46.22.35
    3. Allow all from the range 207.46.22.98/29
    4. Allow all from the ip 217.77.141.52
    5. Allow all from the ip 217.77.141.59
    6. Allow all from the ip 203.32.4.25
    7. Allow all from the range 131.107.0.0/16
    8. Allow all from the range 23.103.224.0/19
    9. Allow all from the range 206.191.224.0/19
    10. Allow all from the range 65.52.80.137/32
    11. Soft deny all IPs which do not match any previous rule
  3. Inlcude 8 allow rules from host _spf-c.microsoft.com.
    1. Allow all from the ip 213.199.138.181
    2. Allow all from the ip 213.199.138.191
    3. Allow all from the ip 207.46.52.71
    4. Allow all from the ip 207.46.52.79
    5. Allow all from the ip 86.61.88.25
    6. Allow all from the range 167.220.67.232/29
    7. Allow all from the range 157.58.196.96/29
    8. Soft deny all IPs which do not match any previous rule
  4. Inlcude 13 allow rules from host _spf-ssg-a.microsoft.com.
    1. Inlcude 9 allow rules from host _spf-ssg-a.msft.net.
      1. Allow all from the range 65.55.81.54/31
      2. Allow all from the range 65.54.121.124/31
      3. Allow all from the ip 103.9.8.121
      4. Allow all from the ip 103.9.8.122
      5. Allow all from the ip 103.9.8.123
      6. Allow all from the ip 42.159.163.81
      7. Allow all from the ip 42.159.163.82
      8. Allow all from the ip 42.159.163.83
      9. Soft deny all IPs which do not match any previous rule
    2. Allow all from the range 111.221.26.0/27
    3. Allow all from the range 207.46.200.0/27
    4. Allow all from the range 207.46.50.192/26
    5. Allow all from the range 65.55.234.192/26
    6. Allow all from the range 65.55.52.224/27
    7. Allow all from the range 94.245.112.0/27
    8. Allow all from the ip 167.220.67.238
    9. Allow all from the ip 51.4.71.62
    10. Allow all from the ip 23.103.131.7
    11. Allow all from the ip 131.253.121.20
    12. Allow all from the ip 131.253.121.52
    13. Soft deny all IPs which do not match any previous rule
  5. Inlcude 13 allow rules from host spf-a.hotmail.com.
    1. Allow all from the range 157.55.0.192/26
    2. Allow all from the range 157.55.1.128/26
    3. Allow all from the range 157.55.2.0/25
    4. Allow all from the range 65.54.190.0/24
    5. Allow all from the range 65.54.51.64/26
    6. Allow all from the range 65.54.61.64/26
    7. Allow all from the range 65.55.111.0/24
    8. Allow all from the range 65.55.116.0/25
    9. Allow all from the range 65.55.34.0/24
    10. Allow all from the range 65.55.90.0/24
    11. Allow all from the range 65.54.241.0/24
    12. Allow all from the range 207.46.117.0/24
    13. Soft deny all IPs which do not match any previous rule
  6. Allow all from the ip 147.243.128.24
  7. Allow all from the ip 147.243.128.26
  8. Allow all from the ip 147.243.1.153
  9. Allow all from the ip 147.243.1.47
  10. Allow all from the ip 147.243.1.48
  11. Deny all IPs which do not match any previous rule
Allow means that the stated addresses are allowed to send emails.
Soft deny means that the stated addresses are not allowed to send emails.
Deny means that emails from the stated addresses must not be accepted.