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 ipswitch.com were found.
ns-2.awsdns-00.com [205.251.192.2]
ns-787.awsdns-34.net
ns-1554.awsdns-02.co.uk
ns-1320.awsdns-37.org

The following rules for the host name ipswitch.com were found. A total of 3 queries (as defined by RFC4408) were performed for fetching SPF and related records.
The DNS lookups for SPF took 741msec.
  1. 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
  2. Inlcude 15 allow rules from host us._netblocks.mimecast.com.
    1. Allow all from the range 207.211.31.0/25 (207.211.31.0 - 207.211.31.127)
    2. Allow all from the range 205.139.110.0/24 (205.139.110.0 - 205.139.110.255)
    3. Allow all from the range 216.205.24.0/24 (216.205.24.0 - 216.205.24.255)
    4. Allow all from the range 170.10.129.0/24 (170.10.129.0 - 170.10.129.255)
    5. Allow all from the range 63.128.21.0/24 (63.128.21.0 - 63.128.21.255)
    6. Allow all from the range 170.10.133.0/24 (170.10.133.0 - 170.10.133.255)
    7. Allow all from the range 185.58.84.93/32 (185.58.84.93 - 185.58.84.93)
    8. Allow all from the range 207.211.41.113/32 (207.211.41.113 - 207.211.41.113)
    9. Allow all from the range 207.211.30.64/26 (207.211.30.64 - 207.211.30.127)
    10. Allow all from the range 207.211.30.128/25 (207.211.30.128 - 207.211.30.255)
    11. Allow all from the range 216.145.221.0/24 (216.145.221.0 - 216.145.221.255)
    12. Allow all from the range 170.10.128.0/24 (170.10.128.0 - 170.10.128.255)
    13. Allow all from the range 170.10.132.56/29 (170.10.132.56 - 170.10.132.63)
    14. Allow all from the range 170.10.132.64/29 (170.10.132.64 - 170.10.132.71)
    15. Soft deny all IPs which do not match any previous rule
  3. Inlcude 2 allow rules from host _spf.salesforce.com.
    1. Allow exists:%{i}._spf.mta.salesforce.com
    2. Deny all IPs which do not match any previous rule
  4. Deny all IPs which do not match any previous rule