In order to prevail on the cause of action, a plaintiff must prove that it had a business relationship with a third party; that the defendant knew of that relationship, and intentionally interfered with it; that the defendant's actions were motivated solely by malice, or otherwise constituted illegal means; and that the defendant's interference caused injury to the plaintiff's relationship with the third party.
684 E. 22nd Realty Co., LLC v. Sheehan, NY Slip Op 04136 (2d Dep't July 22, 2020)
Here is the decision.