Cancels a currently executing send operation.
    Format
      MAIL$SEND_ABORT  context ,in_item_list ,out_item_list
1 – Returns
    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value
    Longword condition value. All utility routines return a condition
    value in R0. Condition values that can be returned by this
    routine are listed under Condition Value Returned.
2 – Arguments
 context
    OpenVMS usage:context
    type:         longword (unsigned)
    access:       modify
    mechanism:    by reference
    Send context information to be passed to send routines. The
    context argument is the address of a longword that contains send
    context information returned by MAIL$SEND_BEGIN.
 in_item_list
    OpenVMS usage:itmlst_3
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Item list specifying options for the routine. This routine does
    not use the in_item_list argument.
 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. This routine does not use the out_item_list argument.
3 – Description
    MAIL$SEND_ABORT is useful when, for example, the user presses
    Ctrl/C during the execution of MAIL$SEND_MESSSAGE.
4 – Condition Value Returned
SS$_NORMAL Normal successful completion.