Configuration file application.ini is found within directory structure of a special kind, like this:

/var/www/rainloop/data/_data_/_default_/configs/application.ini 

RailLoop Plugin:                                                                                                        : https://github.com/RainLoop/rainloop-webmail/tree/master/plugins

cd /var/www/html/rainloop/data/_data_/_default_/plugins

PostfixAdmin Passwd

You should copy this plugin to RainLoop data folder.

https://github.com/RainLoop/rainloop-webmail/tree/master/plugins/postfixadmin-change-password      # Download

->

./data/rainloop-storage/_data_/_default_/plugins

Then you need to config it in the admin panel.

Reset admin password

# vi /var/www/html/rainloop/data/_data_/_default_/configs/application.ini

rainloop/data/_data_xxxx/default/configs/application.ini

[security]

admin_login = "admin"

admin_password = "12345"

     33 ; File size limit (MB) for file upload on compose screen

     34 ; 0 for unlimited.

     35 attachment_size_limit = 25

     74 ; Login and password for web admin panel

     75 admin_login = "admin"

     76 admin_password = "ac0e9a494e09bf0b087fcd5c42ff4fa1"