diff --git a/defaults/main.yml b/defaults/main.yml
index 3a5b9b2..189f611 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -21,12 +21,12 @@ roundcube_db_name:
 roundcube_data_dir: /var/www/html
 
 # imap
-roundcube_imap_host: "" #localhost
-roundcube_imap_port: "" #143
+roundcube_imap_host: "{{ dovecot_container | default('localhost') }}"
+roundcube_imap_port: "143"
 
 # smtp
-roundcube_smtp_host: "" #localhost
-roundcube_smtp_port: "" #587
+roundcube_smtp_host: "{{ dovecot_container | default('localhost') }}"
+roundcube_smtp_port: "587"
 
 # plugins
 roundcube_plugins: []