docker pull postfixadmin
docker run \
-e POSTFIXADMIN_DB_TYPE=mysqli \
-e POSTFIXADMIN_DB_HOST=whatever \
-e POSTFIXADMIN_DB_USER=user \
-e POSTFIXADMIN_DB_PASSWORD=topsecret \
-e POSTFIXADMIN_DB_NAME=postfixadmin \
--name some-postfixadmin \
-p 8080:80
postfixadmin