SMTPCommand stores a set of constants for SMTP command codes. To interpret
the meaning of the codes, familiarity with RFC 821 is assumed.
The mnemonic constant names are transcriptions from the code descriptions
of RFC 821. For those who think in terms of the actual SMTP commands,
a set of constants such as
HELO
are provided
where the constant name is the same as the SMTP command.
DATA
public static final int DATA
EXPAND
public static final int EXPAND
EXPN
public static final int EXPN
HELLO
public static final int HELLO
HELO
public static final int HELO
HELP
public static final int HELP
LOGIN
public static final int LOGIN
LOGOUT
public static final int LOGOUT
MAIL
public static final int MAIL
MAIL_FROM
public static final int MAIL_FROM
NOOP
public static final int NOOP
QUIT
public static final int QUIT
RCPT
public static final int RCPT
RECIPIENT
public static final int RECIPIENT
RESET
public static final int RESET
RSET
public static final int RSET
SAML
public static final int SAML
SEND
public static final int SEND
SEND_AND_MAIL_FROM
public static final int SEND_AND_MAIL_FROM
SEND_FROM
public static final int SEND_FROM
SEND_MESSAGE_DATA
public static final int SEND_MESSAGE_DATA
SEND_OR_MAIL_FROM
public static final int SEND_OR_MAIL_FROM
SOML
public static final int SOML
TURN
public static final int TURN
VERIFY
public static final int VERIFY
VRFY
public static final int VRFY