List the Server-Client dialog to show the sequence of SMTP messages for sending an email from salam@uobaghdad.edu.iq to Ahmed@who.org. You can use the table shown in fig to choose the suitable commands and responses. The body of email to be transmitted contains the following message: Hello Ahmed, Call me please Best regards, Commands (Client MTA → Server MTA) HELO Mailserver-name MAIL FROM: Descriptions Responses (Server MTA A→Client MTA) Descriptions Sends DNS name of the client mail server 220 Recipient server is ready e-mail address of sender 221 RCPT TO: DATA e-mail address of recipient 250 Request to send the message 354 ING QUIT Requests recipient server to close TCP conn 421 RSET Abort current mail transfer 450 Recipient server is closing TCP connection Command carried out successfully Indicates the recipient server is ready to receive Service request declined Mailbox unavailable

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