[Users] Ghost emails / very strange POP behavior

[Ralf Mardorf]

On Tue, 31 May 2016 22:08:06 +0200, Michael wrote:
>However, when those lost mails finally appeared / dropped in, they
>were bold letter = unread. Which fits into what Pierre said, that with
>POP, the read / unread status of the webmail interface is not parsed
>to the downloading MUA.

Why should Claws care about it at all?

Paul already pointed out:

>In Claws Mail, when you elect to leave mails on the server, Claws
>Mail keeps a list of UIDLs (unique identifiers) in a file
>~/.claws-mail/uidl/ named [SERVER]-[EMAIL ADDRESS]. This is how it
>knows what it's already got, and when to remove them from the server.

Likely the only option now is to wait for a reply from your ISP.
Perhaps unplanned maintenance caused the issue.