postfixadmin/ADDITIONS/virtualmaildel.php

<?php
/*
 Virtual Mail Delete
 by George Vieira <george at citadelcomputer dot com dot au>

 You can run this from your crontab with something like

 0 4 * * * *    vmail    php -q virtualmaildel.php >/dev/null

 Changes:
    2017.08.31 updated to use PHP mysqli extension.  
        Tadas Ustinavičius <tadas at ring dot lt> ( https://github.com/postfixadmin/postfixadmin/pull/70 )

*/

$CONF = [];

// Either, uncomment this (and change to work) 
//require_once('/path/to/postfixadmin/config.inc.php');

// OR uncomment this.
/*
$CONF = [
    'database_host' => 'localhost',
    'database_user' => 'someone',
    'database_password' => 'something',
    'database_name' => 'mydb'
];
 */


$MAKE_CHANGES = false; // change to true when you're happy this isn't going to trash your server.

if(empty($CONF)) {
    die("\nPlease configure me\n\n");
}

// Where's the homedir accounts stored. (GET THIS RIGHT OTHERWISE IT THINK NONE EXIST AND DELETES ALL)
$homedir	= '/home/virtual';

if ( ! is_dir( $homedir ) ) {
    die( "Cannot find home directory for virtual mailboxes in $homedir\n" );
}

//
// Recursive Delete Function
//
function deldir($dir)
{
    $current_dir = opendir($dir);
    while($entryname = readdir($current_dir))
    {
        if(is_dir("$dir/$entryname") and ($entryname != "." and $entryname!=".."))
        {
            deldir("${dir}/${entryname}");
        }
        elseif($entryname != "." and $entryname!="..")
        {
            unlink("${dir}/${entryname}");
        }
    }
    closedir($current_dir);
    @rmdir(${dir});
}

// --- Main Start ---

$dir = [];

//
// Get list of directories
//
$fr = opendir( $homedir );

// TODO: Would glob($homedir . '/**/*/new') be somewhat quicker/shorter/less effort?

while ( ($domain = readdir($fr)) !== false)
{
    //
    // Check if it's a dir
    //
    if ( $domain != "." and $domain != ".." and filetype($homedir .'/'. $domain) == "dir" )
    {
        //
        // Open the (assumed) DOMAIN directory
        //
        $ff = opendir( $homedir .'/'. $domain );
        while ( ($user = readdir($ff)) !== false)
        {
            //
            // Check for directories assuming it's a user account
            //
            if ( $user!="." and $user!=".." and filetype($homedir .'/'. $domain .'/'. $user) == "dir" )
            {
                //
                // if the dir 'new' exists inside then it's an account
                //
                if ( file_exists($homedir .'/'. $domain .'/'. $user .'/'. "new") )
                {
                    $dir[$domain][$user] = "";
                }
                else
                {
                    //
                    // Alert that the dir doesn't have a 'new' dir, possibly not an account. Leave it.
                    //
                    echo "UNKNOWN  : " . $homedir ."/". $domain ."/". $user ."/new NOT FOUND. Possibly not an account. Leaving untouched\n";
                }
            }
        } 
    }
} 
//
// OK, got an array of accounts from the dir, Now connect to the DB and check them
//
$conx = mysqli_connect( $CONF['database_host'],$CONF['database_user'],$CONF['database_password'], $CONF['database_name'] );
//
// Is there a problem connecting?
//
if ( ! $conx || mysqli_connect_errno() ) {
    var_dump("DB connection failed." . mysqli_connect_error());
    die("Problem connecting to the database. ");
}

//
// Select all mailboxes to verify against dirs listed in array
//
$query = "SELECT * FROM mailbox";
$result = mysqli_query( $conx, $query );

//
// Query the mailbox table
//
if ( ! $result ) {
    die("Failed to query mailbox table.");
}

//
// Fetch the list of results
//
while ( $row = mysqli_fetch_assoc( $result ) )
{
    //
    // Pull apart the maildir field, needed to figure out the directory structure to compare
    //
    $strip = explode("/",$row['maildir']);
    //
    // Unset the array if it exists. This stops it being erased later.
    //
    unset( $dir[ $strip[0] ][ $strip[1] ] );
}
//
// If there are results. unset the domain too.
//
if ( count($dir[$strip[0]])==0 and mysqli_num_rows($result)>0 ) {
    unset( $dir[$strip[0]] );
}

//
// OK, time to clean up. All known users/domains have been removed from the list.
//

//
// If the array still exists (incase nothing there)
//
if ( is_array($dir) )
{
    //
    // Go through each dir
    //
    foreach ( $dir as $key => $value )
    {
        //
        // Is this a user array?
        //
        if ( is_array( $value) )
        {
            //
            // Go through and nuke the folders
            //
            foreach ( $value as $user => $value2 )
            {
                // Nuke.. need any more explanations?
                $path = $homedir . '/' . $key . '/' . $user;
                if($MAKE_CHANGES) {
                    deldir( $path );
                }
                else {
                    echo " - Would recursively delete : $path \n";
                }
            }
        }
    }
}

echo "Cleanup process completed\n";