==== Required information ====
- iRedMail version (check /etc/iredmail-release): = 0.9.2
- Linux/BSD distribution name and version:  = CentOS6.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): = mysql
- Web server (Apache or Nginx): = apache
- Manage mail accounts with iRedAdmin-Pro? = Pro
- Related log if you're reporting an issue:
====
Hi Zhang,

For some reason user sieve scripts are not executing when a mail arrives at a users mailbox. I have checked the transport and it is dovecot as such:
for cf in $(ls *.cf); do echo $cf; postmap -q 'spam.catcher@orisys.net.au' mysql:./$cf; done
catchall_maps.cf
domain_alias_catchall_maps.cf
domain_alias_maps.cf
recipient_bcc_maps_domain.cf
recipient_bcc_maps_user.cf
relay_domains.cf
sender_bcc_maps_domain.cf
sender_bcc_maps_user.cf
sender_login_maps.cf
spam.catcher@orisys.net.au
transport_maps_domain.cf
transport_maps_user.cf
dovecot
virtual_alias_maps.cf
spam.catcher@orisys.net.au
virtual_mailbox_domains.cf
virtual_mailbox_maps.cf
vmail1/orisys.net.au/s/p/a/spam.catcher-2016.04.04.13.29.37//Maildir/

Must be something in my dovecot.conf I suspect, can you pass your eye over it please?

I have attached my dovecot.conf file