Follow-up emails are emails that are sent after a certain time with the proper purpose. They are mainly used by people who want to make a good impression on his or her potential employer after an interview. It is commonly known that after that kind of meeting the person who has attend it should sent an emails reminding the potential employer about his advantages, qualifications and other positives sites that will come from his employment. Follow – up email messages which are sent automatically after sign – up – instantly or with one day time. They are replay messages that seems to be desirable from their receivers point of view. Sending follow – up messages is a nice tradition and means that it users know the rules of good behavior, it is a polite gesture from their site. They may be also sent because of important events and they are then turned to a certain occasion and their content is based on it. This mean that they can be also event – triggered emails. And some clients like to receive them.