I currently have this trigger which counts contacts within an account that are marked as Primary contacts:

trigger PrimaryContactCount on Contact (after insert, after delete, after undelete, after update) {
    set<Id> accIds = new set<Id>();
    
    if(trigger.isinsert || trigger.isUpdate || trigger.ISundelete){
        for(Contact con: Trigger.new){
        if(Trigger.isInsert || Trigger.isUndelete || (con.Primary_Contact_del__c !=Trigger.oldMap.get(con.Id).Primary_Contact_del__c))
            accIds.add(con.AccountId);
            }
            }
            
            if(trigger.isUpdate || trigger.isDelete) {
            for(Contact con: Trigger.old){
            if(trigger.isDelete || (con.Primary_Contact_del__c != Trigger.oldMap.get(con.ID).Primary_Contact_del__c))
            accIds.add(con.AccountId);
            }
            }
            
            List<Account> accList = [select id, Number_of_Primary_Contacts__c, (Select Id, Primary_Contact_del__c from Contacts) from Account Where ID IN: accIds];
            
            for(Account acc : accList){
            system.debug('Contacts--->'+acc.contacts.size());
            acc.Number_of_Primary_Contacts__c = 0;
            for(Contact con : acc.Contacts) {
            if(con.Primary_Contact_del__c)
            acc.Number_of_Primary_Contacts__c++;
            }
            }
            update accList;
            }

Each contact also has a Do Not Email checkbox, is it possible to alter the trigger so it only counts the Primary Contact when the Do Not Email check box is False.