On Tuesday 18 May 2021 22.12:55 Mike Bird via tde-users wrote:
"New" is a property of the message on the
server, not of the message
copied to the client.
This becomes significant when you have multiple clients or services
or even webmail accessing a single server-side mailbox.
Do you have another client or service - GMail is common - accessing
your imap mails and making them "not new"?
--Mike
Thanks Mike, that may be the reason. No, I don't use gmail to access that
account, but Thunderbird on the pi is accessing these mails. In theory this
is no problem if it forwards them, but if it gets them and does not forward,
they probably loose their "new status".
I'll have to look into it.
Thierry