Every new start of container resets Postmaster's password

[TitanFighter]

I changed password via User Interface Settings, but when I restarted container again via docker-compose up the password is reset to the one which is provided in my docker-compose file (i.e. password):

version: '3.5'
services:
  iredmail:
    image: lejmr/iredmail:mysql-latest
    container_name: iredmail-container
    restart: unless-stopped
    hostname: mail.example.com
    privileged: yes
    ports:
      - "25:25"
      - "587:587"
    volumes:
      - /var/www/mail/mysql:/var/lib/mysql
      - /var/www/mail/vmail:/var/vmail
      - /var/www/mail/clamav:/var/lib/clamav
      - /etc/localtime:/etc/localtime:ro
    environment:
      - MYSQL_ROOT_PASSWORD=password
      - POSTMASTER_PASSWORD={PLAIN}password
      - IREDAPD_PLUGINS="['reject_null_sender', 'reject_sender_login_mismatch', 'greylisting', 'throttle', 'amavisd_wblist', 'sql_alias_access_policy']"
      - VIRTUAL_HOST=mail.example.com
      - VIRTUAL_PORT=443
      - VIRTUAL_PROTO=https
      - LETSENCRYPT_HOST=mail.example.com
      - LETSENCRYPT_EMAIL=email@example.com

I think iredmail-docker should not reset password every new start, because of security concerns.

[Ryu945]

I have an idea on how to fix it but I don't know how to do this or if there will be unintended consequences. Find where the password is being saved. Create a volume for where the password is saved. Then when you remount, your use the volume over and over again. Thus password would persist through remounting.

[lejmr]

This is actually expected behaviour.. I kind of find it useful to have this option for situation when you forget your password.. Even though wiki page for situations when one forgets passwords can be prepared...