[Unit]
Description=Daily inbox tidy

[Timer]
# Early, so the inbox is already tidy by the time it is first looked at, and
# well clear of rent-utilities at 09:00 on the 5th.
OnCalendar=*-*-* 07:30:00
# If the machine was off, still run on the next boot rather than skipping a day
# and letting two days of mail pile up.
Persistent=true
RandomizedDelaySec=10m
AccuracySec=1min

[Install]
WantedBy=timers.target