dovecot - Sep 2015 - modify message with doveadm?

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?

Kind regards,

Frank

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.