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 shaw.ca were found.
ns8socg.shawcable.net
ns9htok.shawcable.net
ns7nocg.shawcable.net

The following rules for the host name shaw.ca were found. A total of 1 queries (as defined by RFC4408) were performed for fetching SPF and related records.
The DNS lookups for SPF took 463msec.
  1. Allow if the IP matches an MX record of shaw.ca
    1. shw-central.mx.a.cloudfilter.net.
      1. 15.222.199.59
      2. 3.96.81.40
  2. Allow all from the range 3.97.99.32/31 (3.97.99.32 - 3.97.99.33)
  3. Allow all from the range 3.97.99.42/31 (3.97.99.42 - 3.97.99.43)
  4. Allow all from the range 64.59.134.0/25 (64.59.134.0 - 64.59.134.127)
  5. Allow all from the range 64.59.136.128/27 (64.59.136.128 - 64.59.136.159)
  6. Allow all from the range 204.209.208.40/31 (204.209.208.40 - 204.209.208.41)
  7. Allow all from the range 204.209.208.150/28 (204.209.208.150 - 204.209.208.159)
  8. Soft deny all IPs which do not match any previous rule