diff --git a/seqs/mailserver.sh b/seqs/mailserver.sh
index 425290e..984ef8d 100755
--- a/seqs/mailserver.sh
+++ b/seqs/mailserver.sh
@@ -150,11 +150,13 @@ step_8() {
   echo "     }"
   echo "   }"
   echo
-  echo "# Auto-create Sent and Trash Folder"
+  echo "# Auto-subscribe Drafts, Sent, Junk and Trash Folder"
+  echo "  and auto delete after 30 days"
   echo "  [/etc/dovecot/conf.d/15-mailboxes.conf]"
   echo "   # Add \"auto = create\" to folder e.g.:"
   echo "   mailbox Trash {"
-  echo "     auto = create"
+  echo "     auto = subscribe"
+  echo "     autoexpunge = 30d"
   echo "     special_use = \\Trash"
   echo "   }"
   echo
@@ -290,14 +292,26 @@ step_25() {
   echo "   sieve_plugins = sieve_extprograms"
   echo "   sieve_user_log = file:/var/vmail/%d/%n/sieve/sieve.log"
   echo
-  echo "# Enable excution of external programs (e.g. to send xmpp messages on certain keywords)"
-  echo "  [$mdaConfDir/90-sieve-extprograms.conf]"
-  echo "   sieve_execute_bin_dir = /usr/lib/dovecot/sieve-extprograms"
-  echo
   echo "# Enable sieve for lmtp"
   echo "  [$mdaConfDir/20-lmtp.conf]"
   echo "   postmaster_address = postmaster@$MAS_DOMAIN"
   echo "   mail_plugins = $mail_plugins sieve"
+  echo
+  echo "# Enable excution of external programs (e.g. to send xmpp messages on certain keywords)"
+  echo "  [$mdaConfDir/90-sieve-extprograms.conf]"
+  echo "   sieve_execute_bin_dir = /usr/lib/dovecot/sieve-execute"
+  echo
+  echo "# Notes on execution of scripts"
+  echo "  * Scripts are executed with the $MAS_VIRTUAL_USER user"
+  echo "  * Scripts must no be writeable by others"
+  echo "    (chown root:$MAS_VIRTUAL_USER script; chmod 750 script)"
+  echo "  * \$HOME is set to the virtual users home"
+  echo "    (e.g. /var/vmail/$MAS_DOMAIN/max)"
+  echo
+  echo "# Notes about sendxmpp"
+  echo "  * .sendxmpprc resides in every virtual users home"
+  echo "    and must be owned by $MAS_VIRTUAL_USER"
+  echo "    (chown $MAS_VIRTUAL_USER: .sendxmpprc; chmod 700 .sendxmpprc)
 }
 
 step_50_info() { echo "Adding relay host for sending mails"; }