Tools supported by Postfix

Postalias
Create or query an alias database.

Postcat
The content of the queue file is displayed, allowing the Administrator to observe the right-click content in the queue.

Postconf
Display or change the Postfix parameter. One parameter or all parameters can be displayed at a time.

Postdrop
Put the email back to the maildrop/directory, and the Postfix will re-deliver the email.

Postfix
Start or stop the Postfix system, or re-read the configuration file. It can also be used for other maintenance tasks, including checking system configurations and clearing queues.

Postkick
Send a request to a specific Postfix service. The role of this tool is to provide shell scripts with a channel that can communicate with postfix.

Postlock
Lock specific files to ensure exclusive access. The role of this tool is to allow shell scripts to use a locking method compatible with postfix.

Postlog
Record the specified information to the system log file. This tool supports shell scripts to record information to log files in a style similar to postfix.

Postmap
Create a DB database for the query table or query the content of the query table. Many configuration information of Postfix is recorded in the query table database created by postmap.

Postqueue
This allows users to access the Postfix queue to a limited extent. The access mode of the queue may be changed only when the administrator privilege is available, and the access capability is provided by the postsuper command.

Postsuper
For administrators to access the Postfix queue. The administrator can delete, hold, and retrieve emails (move emails to the hold Queue). If necessary, the administrator can also repair the queue directory structure.