Hi,
when I reply to an e-mail, this reply is stored in the “Sent” folder. So far so good. However, the reply does not appear as a conversation. Only when I move the first email and the reply to the same folder is the entire conversation visible together.
Since I also have the same behavior with Thunderbird on the desktop, I first suspected that the server was causing problems. However, other mail clients (e.g. emClient) find the mails and show a complete conversation.
Now I’m no longer sure whether it’s the client (K-9 Android, Thunderbird Desktop) or the server (Dovecot 2.3.13, Debian 11.9).
regards, Frank