Sample Trigger to Delete Task

Question

I have a Task being created automatically on Contact detail page whenever an email is fired to any contact.

I do not wish the task to be created for that e-mail.

Can we implement this using a trigger or any other way?

Answer 1

Hopefully the package allows you to configure this behavior. If you must delete them yourself, you could delete all Task records looking up to a Contact fairly easily in an after insert trigger.

public with sharing class TaskServices
{
    public static void cullUnwantedTasks(List<Task> tasks)
    {
        // call this method from your trigger
        List<Id> unwantedTaskIds = new List<Id>();
        for (Task task : tasks)
        {
            if (task.WhatId != null && task.WhatId.getSObjectType() == Contact.sObjectType)
            {
                // I would strongly recommend augmenting the above criteria
                // hopefully something uniquely identifies your tasks
                // e.g. as having originated from the managed package
                unwantedTaskIds.add(task.Id);
            }
        }
        Database.delete(unwantedTaskIds);
    }
}

Proper error handling is advised around the delete operation, but is ommitted for brevity. You will need to determine what behavior is "proper" in this case.