I use Ubuntu Server 8.04 with mdadm controlling a RAID 1 setup, been running great for 3 years.. In my setup I use nullmailer as a simple relay only SMTP for any messages from mdadm in the event of any problems, it has worked superb in the past warning me of impending failures.. Now it appear it can no longer send messages to my ISP as I get failure messages as seen here
Failed to send mail : SMTP command mail from: <john@Amybeth> failed : 553 Amybeth.ispmail.ntl.com does not exist.
It appears as if the problem is (BUT I COULD CERTAINLY BE TOTALLY WRONG !!) with the domain name it is using, obviously Amybeth.ispmail.ntl.com does not exist as Amybeth is only the local name of my server.. I have no idea how to resolve this problem, help would be greatly appreciated !