I have configured everything correctly and it works fine but attachments larger than 1Mb get server error in Roundcube
I have added this line "$config['max_message_size'] = '25M';" to /var/www/mail.server.com/program/lib/Roundcube/rcube_config.php and rcube.php but the error still exists
then I add these configs below to /var/www/mail.server.com/.htaccess :
php_value upload_max_filesize 50M
php_value post_max_size 50M
php_value memory_limit 512M
then I saw "Maximum allowed file size is 50 MB" in attachment section but still I had server error for files larger than 1Mb so I updated mentioned configs in php.ini file located in /etc/php/7.4/fpm/ but still I have server error
also got this in console when server error appears:
Failed to load resource: the server responded with a status of 413 ()