I'm first time here. One small company asked Me to create a e-mail server. Nothing fancy, it should work in email clients like Outlook, iOS, Android. No Web mail is needed.
I have no experience with mail servers so I'm creating most basic one following this tutorial with dovecot imap access following in that link (Build a Secure Email Server on Ubuntu Part 4: Postfix, Dovecot and TLS Encryption, sorry I can't post more links). User base is local users as around 10 mail accounts will be needed.
The same site has tutorial for spam filter. It is working, spam is marked as spam in inbox, but I need that mail is delivered to Junk folder.
I have searched Google a lot, but I can get it working. I have tried a lot of examples, but there is not much on Google. Far as I know Dovecot Sieve is needed, but how to configure it correctly?
I'm using Ubuntu 16.04.3 release.
