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** You connect to your MTA over a <u>secure</u> connection, so your emails can't be read by the operators of the network you're connected to.
** The mail message then travels the rest of the way to the destination MTA <u>unencrypted</u>, so anyone with access to the routers in-between can read all your emails. That is why many organizations will refuse to send you confidential information over email.
* The '''LDA/MDA ''' will receive the email from the MTA, and will store it on disk in some format. '''MailDir ''' and '''MBOX ''' are the most popular mailbox formats.* When sending an email , you send it to the destination using your MTA, but you also want to save it in your '''"Sent" ''' folder for yourself. This is accomplished by a separate connection to your '''IMAP ''' or '''POP3 ''' server.** This is why it Thus, a situation can happen occur that although you sent your email successfully but , it may never makes make it to your "Sent" folder - the <u>second </u> connection to your IMAP server is quite unrelated to the first connection to the SMTP server.* Note that a DNS server is also involved - it's is needed to retrieve the address of the email server responsible for an email for a particular domain. This is done with the MX records we looked at in the DNS labs.
=== Reference client setup ===
