What firmware is running on your NAS? Have you tried using a different Email for sending the alerts? You may want to try to update your firmware in case it is not yet updated.
I have just updated to the Beta 3 firmware and when the system rebooted it did send a email saying the system is rebooting but still shows Alert message failed to send in the logs.
So what message was the device trying to send at the time when it failed @ 09-49 AM ? maybe the timing of the message being sent is when the device has no internet connection on restart?
Was looking at the top of the file, the latest entries are at the bottom, anyway it says
Jan 09 10:51:29 host=send.xtra.co.nz tls=on auth=on user=claytonb@xtra.co.nz from=claytonb@xtra.co.nz recipients=clayton@aaacs.co.nz smtpstatus=554 smtpmsg='554 5.7.1 Message rejected due to possible spam content' errormsg='the server did not accept the mail' exitcode=EX_UNAVAILABLE
Was looking at the top of the file, the latest entries are at the bottom, anyway it says
Jan 09 10:51:29 host=send.xtra.co.nz tls=on auth=on user=claytonb@xtra.co.nz from=claytonb@xtra.co.nz recipients=clayton@aaacs.co.nz smtpstatus=554 smtpmsg='554 5.7.1 Message rejected due to possible spam content' errormsg='the server did not accept the mail' exitcode=EX_UNAVAILABLE
That seems to explain it. You might need to use a different account (gmail perhaps). Or find a way to whitelist the NAS.
