<?!("COND:SUBST", 1, "RCPTREQUIRED")><input type="submit" name="send_button" value="<?_("Send message")>"><?!("X", 1)>
<??("COND:SUBST", 2, "RCPTREQUIRED")><input type="submit" name="send_button" value="<?_("Post message")>"><?!("X", 2)>
<?!("COND:SUBST", 1, "RCPTREQUIRED")><input type="submit" name="send_button" value="<?_("Send message")>"><?!("X", 1)>
<??("COND:SUBST", 2, "RCPTREQUIRED")><input type="submit" name="send_button" value="<?_("Post message")>"><?!("X", 2)>