Hello, I just did an upgrade of Ubuntu 11.04 to 11.10 and now I have problems with the mail server I would to like fix before upgrading to Ubuntu 12.04. The version of MySQL, Postfix and of Dovecot has been upgraded. Now I have this error: Code: Aug 3 06:53:56 ve postfix/proxymap: warning: connect to mysql server 127.0.0.1: Can't connect to MySQL server on '127.0.0.1' (110) Aug 3 06:53:56 ve postfix/trivial-rewrite: fatal: proxy:mysql:/etc/postfix/mysql-virtual_domains.cf(0,lock|fold_fix): table lookup problem I can connect to the database: Code: [email protected]:/etc/dovecot# mysql -u email_admin -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 559 Server version: 5.1.69-0ubuntu0.11.10.1 (Ubuntu) Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> Really complex for me. Does anyone have an idea? Thank you.