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postfix-cloudflare (sha256:7dff1a38ca47b3fdc8c2ab7846dfb6711b4036598032af63e55bdebd2257ff0d)

Published 2025-09-11 04:35:18 +00:00 by tilian

Installation

docker pull git.tburg.net/tilian/postfix-cloudflare@sha256:7dff1a38ca47b3fdc8c2ab7846dfb6711b4036598032af63e55bdebd2257ff0d
sha256:7dff1a38ca47b3fdc8c2ab7846dfb6711b4036598032af63e55bdebd2257ff0d

Image layers

ADD alpine-minirootfs-3.20.7-aarch64.tar.gz / # buildkit
CMD ["/bin/sh"]
LABEL AUTHOR=Tilian Burger <me@tilian.au>
LABEL DESCRIPTION=A Docker image for running Postfix with SSL/TLS and Cloudflare DNS for ACME challenges.
RUN /bin/sh -c apk add --no-cache postfix certbot certbot-dns-cloudflare # buildkit
VOLUME [/etc/letsencrypt]
ENV POSTFIX_MYNETWORKS=127.0.0.1/32
ENV ACME_EMAIL=your_acme_email
ENV DOMAIN=your_domain.com
ENV RELAYHOST=REPLACE.mail.protection.outlook.com
ENV RELAY_PORT=25
ENV MYORIGIN=your_domain.com
RUN /bin/sh -c postconf -e "myhostname = $DOMAIN" && postconf -e "mynetworks = $POSTFIX_MYNETWORKS" && postconf -e "smtp_tls_security_level = encrypt" && postconf -e "smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt" && postconf -e "smtpd_tls_cert_file = /etc/letsencrypt/live/$DOMAIN/fullchain.pem" && postconf -e "smtpd_tls_key_file = /etc/letsencrypt/live/$DOMAIN/privkey.pem" && postconf -e "relayhost = [$RELAYHOST]:$RELAY_PORT" && postconf -e "myorigin = $MYORIGIN" && postconf -e "relay_domains = *" && postconf -e "smtpd_recipient_restrictions = permit_mynetworks, reject" # buildkit
COPY docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh # buildkit
RUN /bin/sh -c chmod +x /usr/local/bin/docker-entrypoint.sh # buildkit
EXPOSE map[25/tcp:{}]
ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]

Labels

Key Value
AUTHOR Tilian Burger <me@tilian.au>
DESCRIPTION A Docker image for running Postfix with SSL/TLS and Cloudflare DNS for ACME challenges.
Details
Container
2025-09-11 04:35:18 +00:00
1
OCI / Docker
linux/arm64
31 MiB
Versions (37) View all
main-01f80fd 2025-09-12
latest 2025-09-12
main 2025-09-12
dev-opendkim 2025-09-12
dev-opendkim-3213a3a 2025-09-12