sanitize-mails

• Save .eml files from thunderbird by using Save as command in thunderbird
• Process them with this package to remove problematic flags for IMAP format on dovecot servers
• Import them to thunderbird (if a lot of .eml files, use ImportExportTools NG add-on, by Christopher Leidigh)
• Move mails to the dovecot server with the Move to command in thunderbird