MAIL$_SEND_ERROR_ENTRY

    MAIL$_SEND_ERROR_ENTRY specifies the longword address of an entry
    point to process errors during a send operation. The descriptor
    of the recipient that failed, the address of the signal array,
    and the user-specified data are passed as input to the routine.
    Refer to the VSI OpenVMS Programming Concepts Manual for more
    information about the signal array and its use by condition-
    handling routines.

 MAIL$_SEND_RECIP_FOLDER

    MAIL$_SEND_RECIP_FOLDER specifies the descriptor of a recipient's
    folder name. If you do not specify the MAIL$_SEND_RECIP_FOLDER
    item code, the mail will be sent to the default NEWMAIL folder. A
    valid folder name can be 1 to 39 characters in length.

 MAIL$_SEND_SUCCESS_ENTRY

    MAIL$_SEND_SUCCESS_ENTRY specifies the longword address of an
    entry point to process successes during a send operation. The
    descriptor of the recipient that succeeded, the address of the
    signal array, and the user-specified data are passed as input
    to the routine. Refer to the VSI OpenVMS Programming Concepts
    Manual for more information about the signal array and its use by
    condition-handling routines.

 MAIL$_SEND_USER_DATA

    MAIL$_SEND_USER_DATA specifies a longword that MAIL$SEND_MESSAGE
    passes to the SEND action routines.

 out_item_list

    OpenVMS usage:itmlst_3
    type:         longword
    access:       write only
    mechanism:    by reference
    Item list specifying the information you want the routine to
    return. The out_item_list argument is the address of a list of
    item descriptors, each of which describes an item of information.
    The list of item descriptors is terminated by longword value of
    0.