dovecot-archive.sh

dovecot-archive.sh

#!/bin/bash

USER="box@example.com"
RETENTION=120
ARCHIVE_ROOT="Archiv"
BOXES_TO_ARCHIVE=("INBOX" "Odeslaná pošta")


# Load all existing subfolders in BOXES_TO_ARCHIVE
BOXES=()
IFS=$'\n'
for BOX in ${BOXES_TO_ARCHIVE[@]}; do
    BOXES+=($(doveadm mailbox list -u ${USER} ${BOX}*))
done

# Set range for mails in the year preceding RETENTION
BEFORE=$(date -d "-${RETENTION} days" "+%Y-%m-%d")
SINCE="${BEFORE:0:4}-01-01"
# Perform for the range above as well as last 10 years
for YEAR in $(seq ${BEFORE:0:4} -1 $((${BEFORE:0:4}-10))); do
    # Perform for all BOXES
    for BOX in ${BOXES[@]}; do
        # Check if there is anything to archive in BOX for period between BEFORE and SINCE
        if [ $(doveadm search -u ${USER} MAILBOX ${BOX} SENTBEFORE ${BEFORE} SENTSINCE ${SINCE} | wc -l) -gt 0 ]; then
            # Create and subscribe ARCHIVE subfolder if it doesn't exist
            ARCHIVE="${ARCHIVE_ROOT}/${YEAR}/${BOX}"
            doveadm mailbox status -u ${USER} messages ${ARCHIVE} >/dev/null 2>&1
            if [ $? -ne 0 ]; then
                doveadm mailbox create -u ${USER} ${ARCHIVE}
                doveadm mailbox subscribe -u ${USER} ${ARCHIVE}
            fi
            # Move the mails to ARCHIVE subfolder
            doveadm move -u ${USER} ${ARCHIVE} mailbox ${BOX} SENTBEFORE ${BEFORE} SENTSINCE ${SINCE}
        fi
    done
    # Move on to previous year
    BEFORE="${YEAR}-01-01"
    SINCE="$((${YEAR}-1))-01-01"
done