If you're utilizing our services to relay mail such as SpamExperts you will need to setup a TXT record which is valid for using our IP's for relaying your mail.
Generally, it's as simple as using an "include" record to such as below.
include:_spf.servercontrol.com.auA full SPF TXT record would look like:
v=spf1 a mx include:_spf.servercontrol.com.au ~all