Send emails to customers of large database requires significant transmission infrastructure. Many companies outsource this task by way of emailing solutions online. If there are still some software to perform this task, they have been superseded by the offer online, faster to implement. The criteria for choosing a solution are first quality of service (data security) and of course the price. It is difficult to compare price offers of bulk mail sending service providers because they do not use all comparable rate method. Your choice will therefore require careful thought.