There are various methods to find out if the SPF record is set up correctly and below are some tools that can be used for verification:

a) Command Prompt

Start -> Run -> cmd
Type: nslookup -q=txt domain name

And for the valid, the output should be as below:

====================================
Server:  resolver1.opendns.com
Address:  208.67.222.222

Non-authoritative answer:
domain name text =

=====================================

b) Checking from URL

– Open the URL http://www.kitterman.com/spf/validate.html in a web browser
– Enter the domain in the Domain Name field.
– Click on the “Get SPF Record(if any)” button.
– The results will be displayed

If there are any errors, the results are displayed at the bottom of the page.

– URL checking open the URL http://mxtoolbox.com/spf.aspx in a web browser
– Enter the domain name in the Domain Name field.
– Click on  Lookup
– The results will be displayed.

If there are any errors, the error results will be displayed.

** Please be advised that any recent update on SPF record will not be reflected immediately on those checking portal as might need some time for the DNS to propagate **