Raspberry Pi Based Lightweight and Energy-Efficient Private Email Infrastructure for SMEs
One of the key aspects that define a Smart City is the use of Information and communication technology (ICT) to develop smart infrastructure that transform working environments. Motivated with this vision, in this article, we propose PiMail, an affordable
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Introduction Electronic mail or Email is no doubt one of the biggest services being used over the Internet today and its importance in modern business communication is undeniable. Email has been around for more than 44 years and its transmission is based on Simple Mail Transfer Protocol (SMTP) [1]. With the wide-spread global usage of emails, the concept of email privacy is also under rapid threat. Email privacy is a very complicated issue that has to deal with unauthorized access and inspection of electronic mail. This unauthorized access can happen while an email is stored on untrusted email servers of the service providers (like Gmail, Yahoo, Hotmail, etc.) or due to broader government surveillance programs such as PRISM [2]. Third-party mail service is easier to use, but they require sacrifice of control and flexibility. Running a private mail server can be an ideal solution to protect email privacy against unauthorized storage access. Private mail server allows full control over both the server and the emails, complete access to mail server’s logs, and access to raw email files in a user’s mail directory. Nevertheless, this control and flexibility comes with an added cost [3]. A Smart City is a development vision that integrate multiple ICT solutions to enhance quality and performance of a working environment by reducing cost and resource consumption. Based on this vision, this article propose PiMail, an affordable, lightweight and energy-efficient private email system based on Raspberry Pi [4]. Raspberry Pi is low-cost, low-power and highly portable single board computer. It is one of the smallest, credit-card sized, single board computer available in the market that has the highest performance to cost ratio. Raspberry Pi makes it possible to create an affordable, energy-efficient and portable miniature S. Hameed (&) M.A. Asif National University of Computer and Emerging Sciences (NUCES), Islamabad, Pakistan e-mail: sufi[email protected] © Springer Nature Singapore Pte Ltd. 2018 L. Ismail and L. Zhang (eds.), Information Innovation Technology in Smart Cities, https://doi.org/10.1007/978-981-10-1741-4_22
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private mail server according to the need of individual users or small enterprise. In short, PiMail fulfils the following promises. • A low cost infrastructure that would cost a onetime investment of around $35– $40 to purchase Raspberry Pi. • Personalized email address like [email protected] with an annual recurring cost of domain registration with a registrar like namecheap.com. • Low electricity consumption with an email server that can run 24/7/365 for under $5 of electricity per year. • The ability to connect from anywhere, and read and send email, using a secure IMAP connection on your phone, tablet or computer. • Complete control over your personal communication. Emails are stored over PiMail server, and nobody scan them to sell adverts. • Smart spam filtering with SpamAssassin [5]. • Efficient virus scanning with ClamAV [6]. We developed a test-bed implementation of PiMail
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