Unless anyone has experienced the same for "Plusnet-secret" email addresses, (as I said earlier it only came into existence as a unique login email address), please can people stop giving reasons why I could be wrong. The main reason for my OP was to see if it was something affecting multiple Plusnet login addresses.
I don't want to be impolite by not replying to suggestions, but in itself I'm not worried by it.
Doing a search on my emails I have found another couple in 2019 that had been moved direct to Junk by Thunderbird on receipt, so I didn't even know they had occurred. The reason I saw this one was I have a new laptop and a new installation of TB, which of course hasn't self-trained from my own Junking

.
There are many reasons why I could be wrong! That is why
I also posted earlier that I had stopped, given the age of that detection.
If ian72 would like to see the whole source, as a matter of analysis by him and education for me as a result, that would interest me

. Beyond that, it doesn't bother me.
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Sovereignty Means
Sovereignty
My broadband basic info/help site -
www.robertos.me.uk. Domains, sites and mail hosting -
Tsohost &
Ionos.
Connections: OnePlus 8 Pro max 165Mbps down, 24Mbps up on Three, and B311 4G, tbb tests normally 35-45Mpbs down, 65Mbps off-peak, 9-24 up.
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Experience shows us that love does not consist in gazing at each other but in looking together in the same direction.
Antoine de Saint-Exupéry.
Edited by RobertoS (Mon 14-Dec-20 23:45:16)