SPF error - please advise on correct record syntax

SPF error - please advise on correct record syntax

 I must use a filter between my workstation and zoho
 - that tool is spamarrest.com
This is my DNS record: at godaddy
v=spf1 a mx ptr include:zoho.com include:spamarrest.com-all

This is the relevant error returned-


Authentication-Results: spf=permerror (sender IP is X>X>X>X) smtp.mailfrom=MYDOM.com; THIERDOM.com; dkim=none (message not signed) header.d=none;thierdom.com; dmarc=none action=none header.from=mydom.com; Received-SPF: PermError (protection.outlook.com: domain of mydom.com used an invalid SPF mechanism) Received: from smtpb.spamarrest.com (X>X>X>x) by xxxxxxxx.mail.protection.outlook.com (Y>Y>Y>Y) with Microsoft SMTP Server (TLS) id Z>Z>Z>Z via Frontend Transport; Thu, 17 Mar 2016 15:25:12 +0000 Received: from mycomputer (X>X>X>X.dyn.grandenetworks.net [X>X>X>X]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: me) by smtpb.spamarrest.com (Postfix) with ESMTPSA id F054BFBC170 for


Help?