msmtpd
light SMTP client with support for server profiles - the regular MTA
RUN apt-get update && \
apt-get install -y msmtp-mta
RUN apt-get update && \
apt-get install -y msmtp-mta
RUN apk add msmtp
RUN pacman -S --noconfirm msmtp
RUN apt-get update && \
apt-get install -y msmtp-mta
RUN dnf install -y msmtp
RUN apt-get update && \
apt-get install -y msmtp