Umpteen messages later……
JA –
The problems I had occurred twice, and in both instances I had changed nothing, nor installed any software.
The system is working again, but with a different signing-in page, so it is very hard to see this as any other than an effect of BT messing about with an e-mail system that had been working perfectly well.
I did have two other problems but not BT-related:
1) Posts arriving with “emojis” replaced by little squares (hooray!) but seriously, attached photographs missing. I am fairly certain these were sent from “smart”-phones not computers.
The block seems to have been a very obscure Firefox setting I could find and change only by an exercise in suspicion, patient menu-trawling, trial-and-error, and inspired(?) guesswork.
2) Certain types of document missing along with the accompanying message. I discovered this when I asked our Club Secretary about papers for the forthcoming NAME meeting. It transpired he had received and circulated them to members but his relay had not reached me.
Contacting the NAME Hon. Sec. directly obtained the two documents, and they were in a curious file-type new to me: .odt. They opened a word-processor of their own, and were printable but in an indirect way.
Now, this suggests some peculiar incompatibility locally, preventing the relay from one receiving computer to another, but not from the originating instrument to either. I can understand that might happen to attachments in non-MS formats, but it is strange the carrying message failed too.
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Computers… Oo’d ‘ave ’em?