POST-INSTALL: * Configure your MTA to use dovecot as your LDA * Add cmusieve to the mail_plugins in dovecot.conf protocol lda { ... mail_plugins = cmusieve # ... other plugins ... } * The default location of the sieve file is .dovecot.sieve in the users mail directory. You can change this in the plugin section. plugin { ... sieve = /var/sieve-scripts/%u/sieve ... }