modify message with doveadm?

[Timo Sirainen]

On 27 Sep 2015, at 19:10, Frank-Ulrich Sommer <f-u.s at gmx.net> wrote:
> 
> Hello,
> 
> I'm using dovecot with getmail and spamassassin. To re-learn false detected mails I created two folders and use an external script that checks the corresponding maildir directories for changes (with inotifywait). The mails found in these directories are passed to sa-learn (to re-learn the correct classification) and then moved back to the inbox or the spam folder.
> 
> To access the mail I use "doveadm search" (to find all mails in the two folders), "doveadm fetch" (to get the text and pass it to sa-learn) and "doveadm move" (to move the mail to the correct location.
> This works as desired, except that a mail once marked as spam will forever be marked as such. Spamassassin has the -d option to remove the markup, but I need to replace the original mail with the cleaned version. The only idea I got was deleting that mail and importing the cleaned one, but as I want to implement several "special" folders for further functionality with different IMAP clients I would prefer a "cleaner" solution.
> 
> What would be the correct/best way to modify the mail body/header/text from an external tool?

IMAP protocol doesn't allow modifying messages. If they change, they need to get a new IMAP UID. So you'll need to use doveadm save + doveadm expunge to do this.