> I'm trying to configure Mercury to fetch my mails send to my dyndns Adress. But it doesn' work at all.
>
> Can you give me some advice, please?
Not sure what you are looking for but DynDNS can forward mail sent to that address using the IP address of the system running Mercury. If Mercury is behind a router then you send it to the IP address of the router and then use NAT to forward port 25 to the system running Mercury's internal address.
Your ISP may be blocking all port 25 actions and so you may have to have the DynDNS system forward to something like port 587 and set MercuryS to receive on that port as well
>  I'm trying to configure Mercury to fetch my mails send to my dyndns Adress. But it doesn' work at all.
>
> Can you give me some advice, please?
Not sure what you are looking for but DynDNS can forward mail sent to that address using the IP address of the system running Mercury.  If Mercury is behind a router then you send it to the IP address of the router and then use NAT to forward port 25 to the system running Mercury's internal address.
Your ISP may be blocking all port 25 actions and so you may have to have the DynDNS system forward to something like port 587 and set MercuryS to receive on that port as well
