diff --git a/README.install b/README.install
index baa872b..00c1276 100644
--- a/README.install
+++ b/README.install
@@ -20,6 +20,15 @@
         will be created automatically.
         choose 'complete Mailserver (with mailboxes)'
 
+   Note:
+      Maybe aou want change mailserver cert and key located in directory '/etc/postfix/ssl':
+         FQHN='e.mx.oopen.de'
+         rm /etc/postfix/ssl/mailserver.crt
+         rm /etc/postfix/ssl/mailserver.key
+         ln -s /var/lib/dehydrated/certs/${FQHN}/fullchain.pem /etc/postfix/ssl/mailserver.crt 
+         ln -s /var/lib/dehydrated/certs/${FQHN}/privkey.pem /etc/postfix/ssl/mailserver.key
+         systemctl restart postfix
+
 
 2.) Install vacation and postfixadmin
    - create configuration file 'install_postfixadmin.conf'
@@ -27,6 +36,17 @@
    - adjust config file 'conf/install_postfixadmin.conf' to your needs
    - run script 'install_postfixadmin.sh'
 
+  Note:
+     Browse to http://adm-e.oopen.de/setup.php to create a 'setup password'
+
+     If this is a fresh new installation, you have also to ceate one (ore more)
+     superadmin account(s).
+     Instructions on how to do this are pointed out at the setup site.
+
+     !! NOTE !!
+         if password encryption is setup with 'dovecotpw' you have to create the admin
+         accounts after installing 'dovecot'.
+
 
 3.) Install AMaViS
    - run script 'install_amavis.sh'.
@@ -40,6 +60,10 @@
    - adjust configuration file 'install_update_dovecot.conf' to your needs
    - run script 'install_update_dovecot.sh'
 
+   Note:
+      Maybe you have to finish installing postfixadmin, i.e creating admin account(s).
+
+
 5.) Install roundcube webmailer
    -  create configuration file 'install_upgrade_roundcube.conf'
       sp -a install_upgrade_roundcube.conf.sample install_upgrade_roundcube.conf