# postfix > Postfix mail transfer agent (MTA) control program. > See also `dovecot`, a mail delivery agent (MDA) that integrates with Postfix. > More information: . - Check the configuration: `sudo postfix check` - Check the status of the Postfix daemon: `sudo postfix status` - Start Postfix: `sudo postfix start` - Gracefully stop Postfix: `sudo postfix stop` - Flush the mail queue: `sudo postfix flush` - Reload the configuration files: `sudo postfix reload`