ECM3408 Enterprise Computing Continuous Assessment 2019-20 David Wakeling Handed Out Handed In Wed 12th February 2020 (T2:04) Mon 16th March 2020 (T2:10) This Continuous Assessment is worth 30% of the module mark. It is an individual assessment, to be submitted using both E-Submit and BART. Your attention is drawn to the College and University guidelines on collaboration and plagiarism. 1 Specification The e-mail standard was first proposed in 1973 at the Defense Advanced Research Projects Agency (DARPA) and later finalised by the Advanced Research Projects Agency Network (ARPANET) in 1977. This Continuous Assessment considers the microservices that might make up a simplified e-mail delivery system. An e-mail message consists of three parts: the from field gives the source e-mail address of the message (for example, “
[email protected]”); the to field gives the destination e-mail address of the message (for example, “
[email protected]”); and the body gives the message content. An e-mail message is delivered over a network of e-mail servers. See Figure 1. When a user sends an e-mail message, it is uploaded to an e-mail server, where a Mail Submission Agent (MSA) puts it into the user’s Outbox. At any time, a user may ask the MSA to list the messages in their Outbox. At regular intervals, an e-mail server Message Transfer Agent (MTA) uses the MSA to read and delete a message from a user’s Outbox, and sends this message across the network to another e-mail server, whose MTA uses its MSA to add the message to another user’s Inbox. At any time, a user may ask the MSA to list the messages in their Inbox, or to read and delete messages from their Inbox. The network address of an e-mail server may be obtained by supplying the source or destination address of an e-mail message to a Blue Book Server . 1 E-Mail server: here.com Inbox Outboxwilma Inbox Outboxfred E-Mail Server: there.com Inbox Outbox betty Inbox Outbox barney -