with \fICURLOPT_MAIL_RCPT(3)\fP, to specify an EXPN request. If the
\fICURLOPT_NOBODY(3)\fP option is specified then the request can be used to
issue NOOP and RSET commands.
-
-The application does not have to keep the string around after setting this
-option.
.SH DEFAULT
NULL
.SH PROTOCOLS