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Xmodulo shows you how a mail server works



Email service is one of the most often used services globally. Today almost everyone has at least one email account. Although clicking on the email send button and delivery of an email message appear seamless, a lot of events take place behind the scenes to make sure that the email reaches its final destination.

The functionality of a mail server can be divided broadly into two processes: sending and receiving emails. The following two protocols oversee these processes.
  How a mail server works