Dovecot - spam training through Outlook

[Özgür Kazancci]

Greetings everyone.

My dovecot mail server doesn't execute *train-spam.sh* script I set,
when moving an e-mail from "Inbox" to "Junk" within Outlook.

However, it does it fine when using an online webmail client a.k.a.
Roundcube Webmail.

Here are few lines from my maillog file showing the situation. Any
idea would be much appreciated.

Log output of the mentioned process:

>From Outlook 2016 (Move from Inbox to Junk folder)
Mar  5 07:50:37 mailserver1 dovecot:
imap(info at mydomain.com)<72501><uGYu6hWgeupOrFX1>: delete: box=INBOX,
uid=10, msgid=<016f01d5f248$45900090$d0b001b0$@test.xxx>, size=3344
Mar  5 07:50:37 mailserver1 dovecot:
imap(info at mydomain.com)<72501><uGYu6hWgeupOrFX1>: expunge: box=INBOX,
uid=10, msgid=<016f01d5f248$45900090$d0b001b0$@test.xxx>, size=3344


>From Roundcube Webmail (Move from Inbox to Junk folder)
Mar  5 07:48:45 mailserver1 dovecot:
imap(info at mydomain.com)<14673></W6k7RWgyEl/AAAB>: sieve: pipe action:
piped message to program `train-spam.sh'
Mar  5 07:48:45 mailserver1 dovecot:
imap(info at mydomain.com)<14673></W6k7RWgyEl/AAAB>: sieve: left message
in mailbox 'Junk'
Mar  5 07:48:45 mailserver1 dovecot:
imap(info at mydomain.com)<14673></W6k7RWgyEl/AAAB>: copy from INBOX:
box=Junk, uid=9, msgid=<2eed864c2c38a690349e87dbd271e474 at test.xxx>,
size=1214
Mar  5 07:48:45 mailserver1 dovecot:
imap(info at mydomain.com)<14673></W6k7RWgyEl/AAAB>: expunge: box=INBOX,
uid=15, msgid=<2eed864c2c38a690349e87dbd271e474 at test.xxx>, size=1214

Dovecot version: 2.3.9.3 running on OpenBSD 6.6

Many thanks,
Özgür.