the e mails which are to be sent and also received for viruses and other malevolent software components if necessary so called attachments to the e mails for data transfer are blocked or relayed to a control authority these attachments can contain specifically software viruses or logic components with malevolent software properties which cannot be immediately or easily detected there are diverse possibilities for providing internet connectivity which is better safeguarded in the inventive manner between an operator station for example st 1 and a remotely mounted sensor actuator s 8 with additional protective capabilities fig2 shows details of one example of the internal functioning of the coupling point a 5 the coupling point is equipped in the conventional manner with suitable standard computer components stc which need not be explained in detail here since they are known to one skilled in the art otherwise the coupling point is able to accept the signals from the sensors s 5 a and s 5 b and send them as a digital signal over the internet whether in a preprogrammed independent manner or after a request by a legitimate sender with an arranged e mail text or code however instead of standard memory modules for the internal controller of the coupling point a 5 dual port rams or roms are used in conjunction with these special memory modules each coupling point then obtains at least two separate e mail addresses one of these e mail addresses remains confidential and is known on a priority basis only to the legitimate operator of a system which can be set or interrogated by.