Finally I could figure out that my Email provider was already saving
copies of emails sent via its SMTP server from any way, whitch I
retrieved with Getmail. By configuring all my clients (Thunderbird,
K9Mail) also to make copies of the emails sent I was generating the
duplicates myself :-)
Hello,
With my configuration Dovecot creates multiple duplicates (sometimes 2,
sometimes 3, sometimes a plenty) of mailfiles when moving them into the
Sent or the Trash folders. This does not affect the Inbox folder. I
observed this while using Thunderbird on Ubuntu as a client as well as
K9-
