postconf
Postfix configuration utility. This command displays the values of the main.cf configuration parameters by default and warns about possible mistyped parameter names. It can also change the main.cf configuration parameter values. More information: <https://manned.org/postconf>.
RUN apt-get update && \
apt-get install -y postfix
RUN apt-get update && \
apt-get install -y postfix
RUN apk add postfix
RUN pacman -S --noconfirm postfix
RUN apt-get update && \
apt-get install -y postfix
RUN dnf install -y postfix-2
RUN apt-get update && \
apt-get install -y postfix