Log data shows successful authentication and mail sent - 2 emails - (for today, 22nd) at 00:00:40 and 09:24:43 .
That's all - no repeated auth attempts and subsequent VM320 errors.
I think we can now safely deduce the culprit....
Yes; my broken CCTV.
Though could you please check the log data again in the morning? It very much looks like the CCTV system, although strangely it does not send us any push notifications. If there are no errors tonight we know for sure the culprit; but if there are...? Could it be a wf-fi connected device or even office click to run etc?
I am sorry if I have got this wrong and I am barking up the wrong tree!
I will exit Outlook but leave everything else on apart from the now broken CCTV.
Re: Sending emails is OK during the day but stops at night?
Good question Jen.
I should keep an accurate diary of everything.
Your message regarding that we thought the CCTV was the culprit was posted I think about 16.30 pm on Tuesday the 22nd. I replied some time on Tuesday evening saying I would leave everything on apart from the CCTV (the DC PSU had burnt out) and asking if you could check the logs from 0.00 am onwards Wednesday the 23rd. Ravenstar informed me that you were not in until Thursday the 24th.
Your examination of the logs for the morning of the 23rd shows no activity; which again points to the CCTV. Furthermore I replaced the PSU and got the CCTV system working again around 19.00 pm on the 23/01 so it was on again this morning (24/01). your logs shows the usual failed auth attempts (VM320 errors). I would say that it is definitely the CCTV system.
I do really appreciate everyone's efforts to find the source of the problem - thank you!
I explored the settings and found one camera out of 8 in the motion detect settings was set to high sensitivity AND to send an email ! I have now disabled this setting and set it to write a log instead.
One last mystery for me is why was the CCTV fine between 19.00 and 00.00 and after then it starts to send multiple auth attempts until early around 7.00 am? Again it has got to be in the CCTV settings somewhere?