How to renew the SSL certificate for dovecot on CentOS

Tweet Make a backup of the old key and certificate file mv /etc/ssl/certs/dovecot.pem /etc/ssl/certs/dovecot.pem.old mv /etc/ssl/private/dovecot.key /etc/ssl/private/dovecot.key.old Create the new SSL certificate openssl genrsa -out /etc/ssl/private/dovecot.key 1024 openssl req -new -x509 -key /etc/ssl/private/dovecot.key -out /etc/ssl/certs/dovecot.pem -days 730 Restart Dovecot: /etc/init.d/dovecot

Manage the postfix mailqueue with postsuper, postqueue and mailq

Tweet Postfix provides with postsuper, postqueue and mailq some  shell utilitys to manage the mailqueue. Here are some examples for common tasks: List all messages that are in the mailqueue postqueue -p The output looks like this: [email protected]:/# postqueue -p

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