Multiple Emails separated by coma validation rule in Salesforce January 16, 2019June 9, 2022InfallibleTechie Admin Syntax: OR( NOT( REGEX( Emails__c , “([a-zA-Z0-9._-]+@[a-zA-Z]+.[a-zA-Z,]{2,4})*”) ), RIGHT( Emails__c , 1 ) = “,” )