By default, when you create a mailbox in postfixadmin, a folder is created for each mailbox. When deleting a mailbox via postfixadmin, only the user is deleted, i.e. access is terminated, but the mailbox folder with all letters remains. If we create a mailbox with the same login, the data will remain the same as if we hadn't deleted the mailbox. In this tutorial, we will set up automatic deletion of mailbox folders when they are deleted in PostfixAdmin.

You can also order a ready-made VPS mail server, you can see more about how it is configured here:

• Linux Debian 12 corporate mail server with pre-configured services

Let's open the configuration file:

/usr/share/nginx/html/postfixadmin/config.inc.php

$CONF['mailbox_postdeletion_script']='sudo -u vmail /usr/local/bin/postfixadmin-mailbox-postdeletion.sh';

Let's create a script file that will delete mailbox folders:

#touch /usr/local/bin/postfixadmin-mailbox-postdeletion.sh

#!/bin/sh
Example script for removing a Maildir from a Courier-IMAP virtual mail
hierarchy.
The script looks at arguments 1 and 2, assuming that they
indicate username and domain, respectively.
The script will not actually delete the maildir. I moves it
to a special directory which may once in a while be cleaned up
by the system administrator.
This script should be run as the user which owns the maildirs. If
the script is actually run by the apache user (e.g. through PHP),
then you could use "sudo" to grant apache the rights to run
this script as the relevant user.
Assume this script has been saved as
/usr/local/bin/postfixadmin-mailbox-postdeletion.sh and has been
made executable. Now, an example /etc/sudoers line:
apache ALL=(courier) NOPASSWD: /usr/local/bin/postfixadmin-mailbox-postdeletion.sh
The line states that the apache user may run the script as the
user "courier" without providing a password.
Change this to where you keep your virtual mail users' maildirs.
basedir=/home/mail
Change this to where you would like deleted maildirs to reside.
trashbase=/var/spool/deleted-maildirs
if [ ! -e "$trashbase" ]; then
echo "trashbase '$trashbase' does not exist; bailing out."
exit 1
fi
if [ echo $1 | fgrep '..' ]; then
echo "First argument contained a double-dot sequence; bailing out."
exit 1
fi
if [ `echo $2 | fgrep '..'` ]; then
    echo "First argument contained a double-dot sequence; bailing out."
exit 1
fi
#subdir=`echo "$1" | sed 's/@.*//'`
subdir=`echo "$1"`
maildir="${basedir}/$2/${subdir}"
trashdir="${trashbase}/$2/`date +%F_%T`_${subdir}"
parent=`dirname "$trashdir"`
if [ ! -d "$parent" ]; then
 if [ -e "$parent" ]; then
 echo "Strainge - directory '$parent' exists, but is not a directory."
 echo "Bailing out."
 exit 1
    else
mkdir -p "$parent"
 if [ $? -ne 0 ]; then
            echo "mkdir -p '$parent' returned non-zero; bailing out."
            exit 1
        fi
    fi
fi
if [ ! -e "$maildir" ]; then
    echo "maildir '$maildir' does not exist; nothing to do."
    exit 1
fi
if [ -e "$trashdir" ]; then
    echo "trashdir '$trashdir' already exists; bailing out."
    exit 1
fi
Move or delete (Move enebled by Default)

mv $maildir $trashdir
#rm -rf $maildir
exit $?

Create a folder to store deleted mailboxes  

mkdir /var/spool/deleted-maildirs 

For this folder, you can configure the frequency of cleaning, this option allows you to avoid loss if the mailbox is accidentally deleted or in case the data may be needed after some time.

Now we need to grant rights to the vmail user to run the script in /etc/sudoers 

# User privilege specification
root ALL=(ALL:ALL) ALL
www-data ALL=(vmail) NOPASSWD: /usr/local/bin/postfixadmin-mailbox-postdeletion.sh 

Now mailbox folders are moved to a separate folder /var/spool/deleted-maildirs when deleted:

mv $maildir $trashdir 
rm -rf $maildir 

Done.