Connected: An Internet Encyclopedia
4.5.1. MINIMUM IMPLEMENTATION
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4.5.1. MINIMUM IMPLEMENTATION

4.5.1. MINIMUM IMPLEMENTATION

In order to make SMTP workable, the following minimum implementation is required for all receivers: 

            COMMANDS -- HELO
                        MAIL
                        RCPT
                        DATA
                        RSET
                        NOOP
                        QUIT

Next: 4.5.2. TRANSPARENCY
Connected: An Internet Encyclopedia
4.5.1. MINIMUM IMPLEMENTATION