This thread has gotten very off track of what the original poster/issue was, please start a new thread for new problems in the future. Do you have backup files made during the 3.2 update? Can you post your previous main.cf (prior to updating), or at least the smtpd_helo_restrictions setting. Also check the /usr/local/ispconfig/server/conf-custom/install/ directory and ensure there's not a postfix template there. It is set in /etc/dovecot/dovecot.conf (you'll have to make a conf-custom template to make your change effective after ispconfig updates).