I am getting an error "File Import Error" / "File size is too large" when osTiceket gets a file from email parser.
If I attached the file manually — no errors.
Error:

File information:

Installation Information:

My osTicket settings:

PHP version:
root@osticket:/etc/php/7.2# php -v
PHP 7.2.24-0ubuntu0.18.04.4 (cli) (built: Apr 8 2020 15:45:57) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies
with Zend OPcache v7.2.24-0ubuntu0.18.04.4, Copyright (c) 1999-2018, by Zend Technologies
My php.ini settings:
root@osticket:/etc/php/7.2# grep -r max_fil *
apache2/php.ini:upload_max_filesize = 32M
apache2/php.ini:max_file_uploads = 20
cli/php.ini:upload_max_filesize = 32M
cli/php.ini:max_file_uploads = 20
I tested both database and file storage — did not help.
I've read a dozen recommendations however can't fix "File size is too large" error. Please advise me what else may be wrong with the system.