DNF Automatic

This post is older than one year. It may contain outdated information or opinions I no longer hold and may not be an adequate guide anymore.

This short post explains how to use curl as an email client with SMTP Authentication support for DNF Automatic.

This can be useful when an email server does not accept emails from a self-hosted mail server.

Curl

Create this script somewhere:

#!/bin/bash

FROM="${1}"
TO="${2}"
SUBJECT="${3}"
BODY="$(cat /dev/stdin)"

curl \
    --ssl-reqd \
    --url "smtps://smtp.example.com:465" \
    --user "username:password" \
    --mail-from "${FROM}" \
    --mail-rcpt "${TO}" \
    --header "Subject: ${SUBJECT}" \
    --header "From: ${HOSTNAME} <${FROM}>" \
    --header "To: Administrator <${TO}>" \
    --form '=(;type=multipart/mixed' --form "=$BODY;type=text/plain" --form '=)'

Edit your DNF Automatic configuration to use command_email as it's emitter.

Define these options in [command_email]:

command_format = "/root/dnfmail.sh {email_from} {email_to} {subject}"
stdin_format = "{body}"
email_from = server@example.com
email_to = you@example.com