Unimarket has an SPF Include that you can use rather than directly referring to specific ip addresses. The advantage is that you will not need to make any SPF changes when Unimarket makes infrastructure changes or adds additional mail servers.
Unimarket will continue to support customers using this method however this is no longer available for new customers or for existing customers to switch to.
Please add the following to your SPF record:
Your resulting SPF should look something like (note: this is just an example, your SPF record may look quite different):
v=spf1 mx include:_spf.unimarket.com ~all