Automated Backup with Borg

backup.sh

#!/bin/bash

export BORG_RSH='ssh -i ~/.ssh/id_ed25519'
export BORG_REPO='ssh://user@storage:22/./mail'
export BORG_PASSPHRASE='**********'

export ARCHIVE=$(date +'%a-%Y-%m-%d')

/usr/bin/borg create           \
    --verbose                  \
    --filter AME               \
    --list                     \
    --stats                    \
    --show-rc                  \
    --compression lz4          \
    --exclude-caches           \
    ::${ARCHIVE}               \
    /var/vmail/mailboxes/ 2>&1 | mailx -s "Borg Backup" 'root@localhost'

/usr/bin/borg prune     \
    --list              \
    --show-rc           \
    --keep-daily    7   \
    --keep-weekly   4   \
    --keep-monthly  6