It is estimated that almost all Internet users have one or two email accounts being maintained and regularly visited. Moreover, almost all types of both formal and informal communications are now conveyed through email services. Reading and sending emails is typically one of the most common online transactions done by Internet users. Everyday, people get online to get and reply to emails.

 Now, email marketing is one of the most used and important marketing campaigns rolled out by companies and marketing firms. Email advertising has really attracted the attention and participation of more businesses and entrepreneurs. It is estimated that the sector for such marketing services has grown tremendously over time.