diff --git a/data/conf/dovecot/dovecot.conf b/data/conf/dovecot/dovecot.conf
index b34f80df..655b3f80 100644
--- a/data/conf/dovecot/dovecot.conf
+++ b/data/conf/dovecot/dovecot.conf
@@ -273,12 +273,15 @@ plugin {
   imapsieve_mailbox2_before = file:/usr/local/lib/dovecot/sieve/report-ham.sieve
   # END
   sieve_pipe_bin_dir = /usr/local/lib/dovecot/sieve
-  sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.execute
+  sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.execute +vacation-seconds
   sieve_max_script_size = 1M
   sieve_max_redirects = 30
   sieve_quota_max_scripts = 0
   sieve_quota_max_storage = 0
   listescape_char = "\\"
+  sieve_vacation_min_period = 5s
+  sieve_vacation_max_period = 0
+  sieve_vacation_default_period = 60s
   sieve_before = dict:proxy::sieve_before;name=active;bindir=/var/vmail/sieve_before_bindir
   sieve_after = dict:proxy::sieve_after;name=active;bindir=/var/vmail/sieve_after_bindir
   sieve_after2 = /var/vmail/sieve/global.sieve