==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version     0.9.9:
- Deployed with the downloadable installer?
- Linux/BSD distribution name and version:  Centos 7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MYSQL
- Web server (Apache or Nginx):Nginx
- Manage mail accounts with iRedAdmin-Pro?: iRedadmin-Pro
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Been using apache for years, new to Nginx.
Everything was ok before upgrading to a new server with the latest iRedmail 0.9.9.
on roundcubewebmail  it show maximum allowed upload size to be 10m, I have followed this article  https://docs.iredmail.org/change.mail.a … size.html:   I know this is not a roundcube issue as I have installed adminer and the same 10m limit applies on import: 
My setting are as follows:
Php.ini (/etc/php.ini)
memory_limit = 200M;
upload_max_filesize = 100M;
post_max_size = 100M;

Roundcube web mail: (/opt/www/roundcubemail/config/config.inc.php)
$config['max_message_size'] = '100M';

Roundcube .htacess  ((/opt/www/roundcubemail-1.3.8/.htacess
php_value    memory_limit   200M
php_value    upload_max_filesize    100M
php_value    post_max_size  100M

Postfix
message_size_limit=104857600
mailbox_size_limit=104857600

nginx /etc/nginx/conf-enabled/client_max_body_size.conf
client_max_body_size 100m;

I Have looked everywhere but can’t see where the 10m is configured, stuck with this my email users need to upload many document >20m
Any idea please.