Hello everybody,

Recently, we have a user who is helping to change the number of new emails, but is working hard.
If you are connected directly to the mailbox via Imap, all e-mails will be available.
Manual, the index was reset and a resync performed.
The following log entries are created:
Sogo:
Aug 13 16:38:28 sogod [22336]: [ERROR] <0x0x55ee2b4dcc00[NGImap4Connection]> Error fetching 80 uids for url: imap://2C947ED1-5ED0-464E-A3C8-E17CE91B12F3%2Aimap-master@"IP-Adresse"/INBOX/

Dovecot:
Aug 13 16:38:27 imap(2C947ED1-5ED0-464E-A3C8-E17CE91B12F3): Error: read(attachments-connector(/MailStore/mail/mailbox/2C947ED1-5ED0-464E-A3C8-E17CE91B12F3/dbox/mailboxes/INBOX/dbox-Mails/u.133)) failed: No such file or directory (uid=133)
Aug 13 16:38:27 imap(2C947ED1-5ED0-464E-A3C8-E17CE91B12F3): Error: mail parser: read(attachments-connector(/MailStore/mail/mailbox/2C947ED1-5ED0-464E-A3C8-E17CE91B12F3/dbox/mailboxes/INBOX/dbox-Mails/u.133), box=INBOX) failed: No such file or directory
Aug 13 16:38:28 imap(2C947ED1-5ED0-464E-A3C8-E17CE91B12F3): Error: read(attachments-connector(/MailStore/mail/mailbox/2C947ED1-5ED0-464E-A3C8-E17CE91B12F3/dbox/mailboxes/INBOX/dbox-Mails/u.133)) failed: No such file or directory (uid=133)
Aug 13 16:38:28 imap(2C947ED1-5ED0-464E-A3C8-E17CE91B12F3): Error: mail parser: read(attachments-connector(/MailStore/mail/mailbox/2C947ED1-5ED0-464E-A3C8-E17CE91B12F3/dbox/mailboxes/INBOX/dbox-Mails/u.133), box=INBOX) failed: No such file or directory
Aug 13 16:38:29 imap(2C947ED1-5ED0-464E-A3C8-E17CE91B12F3): Error: read(attachments-connector(/MailStore/mail/mailbox/2C947ED1-5ED0-464E-A3C8-E17CE91B12F3/dbox/mailboxes/INBOX/dbox-Mails/u.133)) failed: No such file or directory (uid=133)
Aug 13 16:38:29 imap(2C947ED1-5ED0-464E-A3C8-E17CE91B12F3): Error: mail parser: read(attachments-connector(/MailStore/mail/mailbox/2C947ED1-5ED0-464E-A3C8-E17CE91B12F3/dbox/mailboxes/INBOX/dbox-Mails/u.133), box=INBOX) failed: No such file or directory
Aug 13 16:38:29 imap(2C947ED1-5ED0-464E-A3C8-E17CE91B12F3): Error: read(attachments-connector(/MailStore/mail/mailbox/2C947ED1-5ED0-464E-A3C8-E17CE91B12F3/dbox/mailboxes/INBOX/dbox-Mails/u.133)) failed: No such file or directory (uid=133)
Aug 13 16:38:29 imap(2C947ED1-5ED0-464E-A3C8-E17CE91B12F3): Error: mail parser: read(attachments-connector(/MailStore/mail/mailbox/2C947ED1-5ED0-464E-A3C8-E17CE91B12F3/dbox/mailboxes/INBOX/dbox-Mails/u.133), box=INBOX) failed: No such file or directory

I am happy to provide more information. However, this problem currently affects 20 users of about 10 thousand ...

Thanks and regards
Robin