Postfix isn't reconfigured during updates
When running "ispconfig_update_from_svn.sh", all services but Postfix get updated:
Configuring Jailkit Configuring SASL Configuring PAM Configuring Courier Configuring Spamassassin Configuring Amavisd Configuring Getmail Configuring Pureftpd Configuring MyDNS Configuring Apache Configuring Database Configuring Firewall Updating ISPConfig
Postfix should be updated as well.