added auto-archive script for mailsrv

src/mailsrv/Containerfile

@@ -35,6 +35,12 @@ RUN addgroup --gid ${FILESUID:?} vmail && \
 # copy our custom scripts
 COPY assets/bin /usr/local/bin
 
+# copy root's crontab
+COPY assets/crontab /root/
+
+# load root's crontab
+RUN crontab /root/crontab
+
 ###
 ### mkvirtual
 ###

src/mailsrv/assets/bin/maint

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+cd /vol/mail
+
+for user in *; do
+    # create an archive mailbox (and throw away error because
+    # we don't mind if it already exists)
+    doveadm mailbox create -u $user -s Archive 2> /dev/null
+
+    # get current year
+    currentyear=$(date +%Y)
+    # assume no messages in INBOX are older than this year
+    #year=2000
+    year=$(($currentyear-1))
+    while [[ year -le $currentyear ]]; do
+        # create an Archive/$year mailbox
+        doveadm mailbox create -u $user -s Archive.$year 2> /dev/null
+
+        # Get list of all subdirs of INBOX
+        mailboxes=$(doveadm mailbox list -u $user | grep -E '^INBOX\..*$' \
+                    | perl -pe 'chomp if eof' | perl -pe 's/^/MAILBOX /' \
+                    | perl -pe 's/\n/ OR /')
+        # add Sent and INBOX to our mailboxes list
+        mailboxes="MAILBOX Sent OR INBOX ${mailboxes:+OR} $mailboxes"
+        # move to the Archive/$year mailbox messages that:
+        # have been flagged as read,
+        # were received on or before $year,
+        # are older than 90 days,
+        # and are in our aforementioned mailboxes
+        doveadm move -u $user Archive.$year SEEN BEFORE 1-Jan-$(($year+1)) \
+                                            BEFORE 90d \( $mailboxes \)
+
+        # delete messages from Trash that have been there for more than 2 weeks
+        doveadm expunge -u $user SAVEDBEFORE 2w MAILBOX Trash
+
+        # step year variable
+        year=$(($year+1))
+    done
+done

src/mailsrv/assets/crontab

@@ -0,0 +1,4 @@
+# m h  dom mon dow   command
+
+# Run daily mail maintenance
+11 1   *   *   *     /usr/local/bin/maint