Hello, after we are switching from qmail to postfix, email queue starts growing and postfix starts produce errors. Some emails are delivered without problem but many stays in deferred que. postqueue -p display this error: "(temporary failure. Command output: sh: /usr/sbin/sendmail: No such file or directory 4.2.1 Message can not be delivered at this time)" We have latest Plesk version (10.3.1) on CentOS 5. All updates are installed. Please, Any advice? Thank you. Sorry for my english. Im not native speaker.