It's a docker image for SquirrelMail

# docker run -p 22-p 80 -d -v /tmp:/tmp squirrelmail:latest /usr/bin/supervisord

1. Use root/root to login
2. config SquirrelMail with the following command in SSH

# /etc/squirrelmail/conf.pl

3. Config IMAP connection information

`2. Server Settings ' ==> ' A. Update IMAP Settings '