mbsync
IMAP and MailDir mailbox synchronizer
RUN apt-get update && \
apt-get install -y isync
RUN apt-get update && \
apt-get install -y isync
RUN apk add isync
RUN pacman -S --noconfirm isync
RUN apt-get update && \
apt-get install -y isync
RUN dnf install -y isync
RUN apt-get update && \
apt-get install -y isync