A newsletter can become highly Company email list profitable. It allows you to make important communications quickly. Disadvantages of using a newsletter newsletter-disadvantages if not done well. It can be a nuisance for the user. Achieving the opposite effect of a newsletter. Although it is true that obtaining emails from users of interest is important. There are other brands that are also in contact with the client through this means. With which competition is high. Creating multiple newsletters for each segmented group of your customer base can be difficult and relatively expensive Company email list.