modification does not work

Hello,
all the modifications of the file are not taken into account

/root/mailinabox/conf/www_default.html

it is an electronic mailbox
take control of your email at https://mailinabox.email/

I added custom code, reseparated the server

impossible, modification does not work i still have the same default page

I don’t know how to make the changes I made work.

I restarted the server, it’s still the same, I did a sudo mailinabox again

The MIAB admin page (admin / web) lets you specify the location of web source. The default location is /home/user-data/www/default and changes to whatever is stored there are reflected by the web server. (Assuming you’re not looking at a cached version of the page!)