docker-dovecot-getmail is a Docker image based on Debian implementing a private email gateway with dovecot and getmail for gathering emails from multiple accounts on a private server (IMAP), but using a public email infrastructure for sending (SMTP).
It is a Docker container realizing a similar architecture to:
+-----------+ +-----------+ +--------------+
| ISP | | DOCKER | | LAPTOP |
| | | | +-->|--------------|
| +-------+ | push/delete | +-------+ | push/sync | | MAIL CLIENT +---+
| | IMAPS +----------------->| IMAPS +<------------+ +--------------+ |
| +-------+ | | +-------+ | | +--------------+ |
| +-------+ | | | | | ANDROID | |
| | SMTP |<-------+ | | +-->|--------------| |
| +-------+ | | | | | MAIL CLIENT +---+
+-----------+ | +-----------+ +--------------+ |
+------------------------------------------------------+
Open source project:
- github: http://github.com/gw0/docker-dovecot-getmail/
- technology: debian, dovecot, getmail
- docker hub: https://hub.docker.com/r/gw000/dovecot-getmail/
Requirements:
/home: mounted users directories (Maildirin fs layout,sieve,.getmail)/etc/cron.d: mounted crontabs for executing all getmail accounts/etc/ssl/private: mounted SSL/TLS certificates (dovecot.crt,dovecot.key)
Prepare your getmailrc account configurations per user (/srv/mail/home/user/.getmail/[email protected]):
# ~/.getmail/getmailrc-*: getmailrc email configuration
[retriever]
type = SimpleIMAPSSLRetriever
server = imap.email.invalid
username = [email protected]
port = 993
password = password
mailboxes = ("INBOX", "Sent", "Spam")
[destination]
type = MDA_external
path = /usr/lib/dovecot/deliver
arguments = ("-e",)
[options]
read_all = false
delete_after = 30
delivered_to = false
received = true
verbose = 1
If you are using Sieve filters and want a Refilter mailbox to trigger their refiltering, create a refilter configuration per user (/srv/mail/home/user/.getmail/getmailrc-refilter):
# ~/.getmail/getmailrc-*: getmailrc refilter configuration
[retriever]
type = SimpleIMAPRetriever
server = localhost
port = 143
username = user
password = password
mailboxes = ("Refilter",)
[destination]
type = MDA_external
path = /usr/lib/dovecot/deliver
arguments = ("-e",)
[options]
read_all = false
delete = true
delivered_to = false
received = false
verbose = 1
Prepare crontab file (/srv/mail/cron.d/getmail) for periodically checking for new mail for each user and account:
# /etc/cron.d/getmail: system-wide crontab for getmail
SHELL=/bin/sh
# m h dom mon dow user command
*/20 * * * * user ACC="user-refilter" && (date; flock -n ~/.getmail/lock-$ACC getmail --rcfile="getmailrc-$ACC" --idle Refilter) >>"/var/log/getmail/$ACC.log" 2>&1
*/20 * * * * user ACC="[email protected]" && (date; flock -n ~/.getmail/lock-$ACC getmail --rcfile="getmailrc-$ACC" --idle INBOX) >>"/var/log/getmail/$ACC.log" 2>&1
Do not forget to place your SSL certificates as /srv/mail/ssl/dovecot.crt and /srv/mail/ssl/dovecot.key. SSL is required!
And finally start it with docker:
$ docker run -d -v /srv/mail/home:/home -v /srv/mail/cron.d:/etc/cron.d -v /srv/mail/ssl:/etc/ssl/private:ro -p 143 -p 993 -p 4190 --name mail gw000/dovecot-getmailOr use docker-compose (check out docker-compose.example.yml).
Users are created automatically with default password (replaceMeNow) on first start. To reset user passwords (of a running container):
$ docker exec -it mail passwd userIf you encounter any bugs or have feature requests, please file them in the issue tracker or even develop it yourself and submit a pull request over GitHub.
Copyright © 2016-2021 gw0 [http://gw.tnode.com/] <[email protected]>
This library is licensed under the GNU Affero General Public License 3.0+ (AGPL-3.0+). Note that it is mandatory to make all modifications and complete source code of this library publicly available to any user.