mail is mark spam form outlook2013

mail is mark spam form outlook2013

Hello
We have a problem with your email solution.
When sending mail from a client such as Outlook 2013 to a recipient reaches them as SPAM, but if you send from the site mail.zoho sends it smoothly. As I configure Outlook?

We have set up SPF and domainskeys for our domain.
For example if the julianmunera@une.net.co sending mail from the Outlook 2013 client appears as SPAM.

Thanks for your reply