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sakura_delete_trashmail.sh

#!/usr/bin/env bash

set -e
set -u
set -o pipefail
set -C

MAILDIR=$HOME/MailBox
MTIME=30

find $MAILDIR -type d -depth 1 | while read account; do
    maildir="${account}/maildir"
    trashdir="$maildir/.Trash"
    spamdir="$maildir/.spam"
    if [[ ! -d $trashdir ]]; then
        continue
    fi
    if [[ ! -d $spamdir ]]; then
        continue
    fi
    find $trashdir/{new,cur} $spamdir/{new,cur} -type f -mtime +${MTIME} | xargs  --no-run-if-empty rm -frv
done