diff --git a/cmd/mailfull/command/catchall.go b/cmd/mailfull/command/catchall.go
new file mode 100644
index 0000000..3c1db48
--- /dev/null
+++ b/cmd/mailfull/command/catchall.go
@@ -0,0 +1,64 @@
+package command
+
+import (
+	"fmt"
+
+	"github.com/directorz/mailfull-go"
+)
+
+// CatchAllCommand represents a CatchAllCommand.
+type CatchAllCommand struct {
+	Meta
+}
+
+// Synopsis returns a one-line synopsis.
+func (c *CatchAllCommand) Synopsis() string {
+	return "Show a catchall user."
+}
+
+// Help returns long-form help text.
+func (c *CatchAllCommand) Help() string {
+	txt := fmt.Sprintf(`
+Usage:
+    %s %s domain
+
+Description:
+    %s
+
+Required Args:
+    domain
+        The domain name.
+`,
+		c.CmdName, c.SubCmdName,
+		c.Synopsis())
+
+	return txt[1:]
+}
+
+// Run runs the command and returns the exit status.
+func (c *CatchAllCommand) Run(args []string) int {
+	if len(args) != 1 {
+		fmt.Fprintf(c.UI.ErrorWriter, "%v\n", c.Help())
+		return 1
+	}
+
+	domainName := args[0]
+
+	repo, err := mailfull.OpenRepository(".")
+	if err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	catchAllUser, err := repo.CatchAllUser(domainName)
+	if err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	if catchAllUser != nil {
+		fmt.Fprintf(c.UI.Writer, "%s\n", catchAllUser.Name())
+	}
+
+	return 0
+}
diff --git a/cmd/mailfull/command/catchallset.go b/cmd/mailfull/command/catchallset.go
new file mode 100644
index 0000000..c7fa893
--- /dev/null
+++ b/cmd/mailfull/command/catchallset.go
@@ -0,0 +1,80 @@
+package command
+
+import (
+	"fmt"
+
+	"github.com/directorz/mailfull-go"
+)
+
+// CatchAllSetCommand represents a CatchAllSetCommand.
+type CatchAllSetCommand struct {
+	Meta
+}
+
+// Synopsis returns a one-line synopsis.
+func (c *CatchAllSetCommand) Synopsis() string {
+	return "Set a catchall user."
+}
+
+// Help returns long-form help text.
+func (c *CatchAllSetCommand) Help() string {
+	txt := fmt.Sprintf(`
+Usage:
+    %s %s domain user
+
+Description:
+    %s
+
+Required Args:
+    domain
+        The domain name.
+    user
+        The user name that you want to set as catchall user.
+`,
+		c.CmdName, c.SubCmdName,
+		c.Synopsis())
+
+	return txt[1:]
+}
+
+// Run runs the command and returns the exit status.
+func (c *CatchAllSetCommand) Run(args []string) int {
+	if len(args) != 2 {
+		fmt.Fprintf(c.UI.ErrorWriter, "%v\n", c.Help())
+		return 1
+	}
+
+	domainName := args[0]
+	userName := args[1]
+
+	repo, err := mailfull.OpenRepository(".")
+	if err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	catchAllUser, err := mailfull.NewCatchAllUser(userName)
+	if err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	if err := repo.CatchAllUserSet(domainName, catchAllUser); err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	mailData, err := repo.MailData()
+	if err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	err = repo.GenerateDatabases(mailData)
+	if err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	return 0
+}
diff --git a/cmd/mailfull/command/catchallunset.go b/cmd/mailfull/command/catchallunset.go
new file mode 100644
index 0000000..bf4164a
--- /dev/null
+++ b/cmd/mailfull/command/catchallunset.go
@@ -0,0 +1,71 @@
+package command
+
+import (
+	"fmt"
+
+	"github.com/directorz/mailfull-go"
+)
+
+// CatchAllUnsetCommand represents a CatchAllUnsetCommand.
+type CatchAllUnsetCommand struct {
+	Meta
+}
+
+// Synopsis returns a one-line synopsis.
+func (c *CatchAllUnsetCommand) Synopsis() string {
+	return "Unset a catchall user."
+}
+
+// Help returns long-form help text.
+func (c *CatchAllUnsetCommand) Help() string {
+	txt := fmt.Sprintf(`
+Usage:
+    %s %s domain
+
+Description:
+    %s
+
+Required Args:
+    domain
+        The domain name.
+`,
+		c.CmdName, c.SubCmdName,
+		c.Synopsis())
+
+	return txt[1:]
+}
+
+// Run runs the command and returns the exit status.
+func (c *CatchAllUnsetCommand) Run(args []string) int {
+	if len(args) != 1 {
+		fmt.Fprintf(c.UI.ErrorWriter, "%v\n", c.Help())
+		return 1
+	}
+
+	domainName := args[0]
+
+	repo, err := mailfull.OpenRepository(".")
+	if err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	if err := repo.CatchAllUserUnset(domainName); err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	mailData, err := repo.MailData()
+	if err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	err = repo.GenerateDatabases(mailData)
+	if err != nil {
+		fmt.Fprintf(c.UI.ErrorWriter, "[ERR] %v\n", err)
+		return 1
+	}
+
+	return 0
+}
diff --git a/cmd/mailfull/main.go b/cmd/mailfull/main.go
index 5d2cad0..b05b11d 100644
--- a/cmd/mailfull/main.go
+++ b/cmd/mailfull/main.go
@@ -87,6 +87,18 @@ func main() {
 			meta.SubCmdName = c.Subcommand()
 			return &command.UserCheckPwCommand{Meta: meta}, nil
 		},
+		"catchall": func() (cli.Command, error) {
+			meta.SubCmdName = c.Subcommand()
+			return &command.CatchAllCommand{Meta: meta}, nil
+		},
+		"catchallset": func() (cli.Command, error) {
+			meta.SubCmdName = c.Subcommand()
+			return &command.CatchAllSetCommand{Meta: meta}, nil
+		},
+		"catchallunset": func() (cli.Command, error) {
+			meta.SubCmdName = c.Subcommand()
+			return &command.CatchAllUnsetCommand{Meta: meta}, nil
+		},
 		"commit": func() (cli.Command, error) {
 			meta.SubCmdName = c.Subcommand()
 			return &command.CommitCommand{Meta: meta}, nil