OfflineIMAP is a GPLv2 software to dispose your mailbox(es) as a local Maildir(s). For example, this allows reading the mails while offline without the need for your mail reader (MUA) to support disconnected operations. OfflineIMAP will synchronize both sides via IMAP. OfflineIMAP

docker create --name=offlineimap \
  -v <path to data volume>:/vol \
  -e CONFIG_PATH=<config - optional, default: /vol/config> \
  -e SECRETS_PATH=<secrets - optional, default: /vol/secrets> \
  -e MAIL_PATH=<mail - optional, default: /vol/mail> \
  -e CRON_SCHEDULE=<sync cron-job schedule - optional, default: "0 3 * * *"> \
  -e PUID=<uid - optional, default: 911> \
  -e PGID=<gid - optional, default: 911> \
  -e PGIDS=<additional gids - optional> \
  -e TZ=<timezone - optional> \
  cryptopath/offlineimap

The parameters are split into two halves, separated by a colon, the left hand side representing the host and the right the container side. For example with -p external:internal - this shows the port mapping from internal (container) to external (host) ports. So -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080 http://192.168.x.x:8080 would show you what's running INSIDE the container on port 80.

• -v /vol - the base directory of the data volume
• -e CONFIG_PATH (default: /vol/config) - where offlineimap should store config files
• -e SECRETS_PATH (default: /vol/secrets) - folder for storing secrets (passwords, certificates)
• -e MAIL_PATH (default: /vol/mail) - local mail folder base path
• -e CRON_SCHEDULE (default: "0 3 * * *") - the string supplied to cron for running the sync job
• -e PUID for UserID - see below for explanation
• -e PGID for GroupID - see below for explanation
• -e PGIDS for additional GroupIDs - see below for explanation
• -e TZ for timezone information, eg. Europe/London

It is based on alpine linux with s6 overlay, for shell access whilst the container is running do docker exec -it offlineimap /bin/bash.

Sometimes when using data volumes (-v flags) permissions issues can arise between the host OS and the container. We avoid this issue by allowing you to specify the user PUID and group PGID, as well as additional groups PGIDS. Ensure the data volume directory on the host is owned by the same user you specify and it will "just work" ™.

In this instance PUID=1001 and PGID=1001. To find yours use id user as below:

  $ id <dockeruser>
    uid=1001(dockeruser) gid=1001(dockergroup) groups=1001(dockergroup)

You can also optionally specify additional group identifiers like this: PGIDS="2001 2003 2004". These group-ids will then be added to the user.

[general]
metadata = /vol/config/metadata
accounts = [email protected]
maxsyncaccounts = 3
ui = basic
socktimeout = 120

[mbnames]
enabled = yes
filename = /vol/config/email/mailboxes
header = "mailboxes "
peritem = "+%(accountname)s/%(foldername)s"
sep = " "
footer = "\n"

[Account [email protected]]
localrepository = [email protected]
remoterepository = [email protected]
autorefresh = 2
quick=10

[Repository [email protected]]
type = Maildir
localfolders = /vol/mail/[email protected]

[Repository [email protected]]
type = IMAP
remotehost = mail.example.org
remoteuser = [email protected]
remotepassfile = /vol/secrets/[email protected]
sslcacertfile: %(systemcacertfile)s
ssl = yes
readonly = True
remoteport = 993

[DEFAULT]
systemcacertfile = /etc/ssl/certs/ca-certificates.crt

Make sure the container is stopped before editing these settings.

• To monitor the logs of the container in realtime docker logs -f offlineimap.

• container version number

docker inspect -f '{{ index .Config.Labels "org.opencontainers.image.version" }}' offlineimap

• image version number

docker inspect -f '{{ index .Config.Labels org.opencontainers.image.version" }}' cryptopath/offlineimap

(c) 2018 Ismail "CeRiAl" Khatib <[email protected]>.

This software is licensed under the MIT terms, you can find a copy of the license on the LICENSE file in this repository.

• 2018-11-03: Version 0.1.0
• 2018-10-07: Version 0.0.2
• 2018-10-06: Initial Release.