Hello, I'm having some strange behaviour, initially noticed due to the NAS not sending emails with status updates. I have two OMV NAS devices on the same network, both running fine and can access both locally, rsync is working between them. Iniitally both with static ips and same settings for the rest (netmask, gateway, DNS etc) one works no problem. The other seems to have issues sending emails with the error coming back
"postfix/smtp[128311]: 0456720161: to=, relay=none, delay=210479, delays=210479/0/0/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=mail.uk2.net type=A: Host not found, try again)"
Now if I change the mail server to the ip address this works. Using the host name it doesn't appear to even try to connect to the sever as I see no traffic on the firewall on port 465, switch to ip address and I see it working. When I try using ping to the host name it fails but using ip address it works [mail sever or google].
I expect also due to the above it's also not receiving OMV updates as the version [6.0.40-1 (Shaitan)] is older than the other functional NAS [6.0.45-1 (Shaitan)] both have been migrated from version 4 and have been working.
This seem to be a recent issue, I'm at a loss to narrow it down. I could understand if it was effecting all devices on my network or both OMV devices but it does seem to be individual.
210479/0/0/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=mail.uk2.net type=A: Host not found, try again)