You can add a task to a task list using your email in a few easy steps:
Go to the task list in question and click on the plus sign in the upper corner of the task list, select Email to this list:
A unique email address will be generated which you can now copy:
Paste the email address in the recipient field and add the following:
Subject: This will be the title of the task
Text: This will be the description of the task
Attachments: Add an attachment to the email and they will appear in the task.
So if your email looks like this:
Your task will look like this:
Note: If the person creating the task is not in your Productive account, they will automatically be added as a Contact.