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S: 1 120
S: 2 200
S: .


: LIST 2
S: +OK 2 200



: LIST 3
S: -ERR no such message, only 2 messages in maildrop

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RETR msg

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: RETR 1

S: +OK 120 octets
S: <text message>
S: .

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DELE msg

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: DELE 1
S: +OK message 1 deleted



: DELE 2
S: -ERR message 2 already deleted

     -  -
 NOOP.        
 "+OK":

: NOOP
S: +OK

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