Topic: HOW TO REDIRECT ON THE ADDRESS DISTINCT FROM THE SENDER?
There is a host through which letters on SMTP in the Internet walk further.
Sometimes transit letters on the incorrect address of the receiver (either a box name, or a domain name not truly).
Through certain time this host directs to reversely sender.
HOW TO MAKE SO THAT LEFT ON OTHER ADDRESS WHICH IS DISTINCT FROM THE SENDER.
On this host it is installed EXIM.