Separate emails register as separate complaints; while a letter will only be one complaint. Email will tell how many people are being affected and from what provinces and under what circumstances. We are not some kind of registered body who has power; that is when letter works; nobody will be receiving the letter from us.
Here, emails will work to CIC. Additionally, emails to immigration minister and phone calls to his office are going to work. If we want to build up some momentum and atleast have them answer our questions.