Hi,    I tried to set up small mail server from my NAS but got some trouble with SMTP hostname   SMTP Valid Hostname Reverse DNS is not a valid Hostname   SMTP Reverse DNS Mismatch OK - 220.240.XXX.XXX resolves to oxxxxxx.com.au Is anything can be done to appoint a valid Hostname? From my understanding this set up shoud be done on ISP side, innit?    ... View more