mailqueue-runner

• All CLI tools like mq-mail and mq-sendmail now ensure that sent messages use CRLF (\r\n) as mandated by the SMTP RFCs (a045882c868be93ddf160aeeb11f02b45da49657). Some SMTP servers reject messages which use only LF (\n).
• mq-send-test: provide feedback for interactive terminals (aa8207f1d24123a36d8543b52325cd5e96725b32)
• mq-send-test: prefer from setting from config file if --from=... is not set (ac615d5af342800c79b15b1a665b8bd61f10a092)
• also run tests for Python 3.13

• mq-sendmail now accepts default CLI parameters from cronie (9438e4144a0a879fe17a9cdca0531291f3911188). This means cronie can send emails containing the output of cron jobs if mq-sendmail is available under /usr/sbin/sendmail.
• The RPM package now uses the alternatives mechanism to provide implementations for /usr/sbin/sendmail and /usr/bin/mail so that cronie and dnf-automatic can send their emails via mailqueue-runner.

• mq-mail: provide (very limited) replacement for /usr/bin/mail
• mq-sendmail now also supports -t/--read-recipients
• avoid warnings when executing mq-run when the queue folder was missing some maildir subdirectories (5ccb66da8255e303a6eb0981e10af777db23f6bd)
• Simplify logging of email deliveries when using the CLI tools mq-run, mq-mail, ... (ae12b28cec28a34e2d4477fc406e2325b1d1bf03)

• mq-sendmail: a bare-bones CLI script which can replace /usr/bin/sendmail
• CLI scripts now load config from well-known locations by default (~/.mailqueue-runner.conf, /etc/mailqueue-runner.conf)
• PuzzlePluginSystem is now an optional dependency
• dropped support for Python 2
• provide dnf repository for Fedora and EL9
• fix exception in message logging when email contained 8 bit characters

Code base modernization: Library should support Python 2.7 and Python 3.6-3.12.

This will be the last release supporting Python 2.7.