crivella1/docker-mailserver repository overview

⁠docker-mailserver

Simplified version of docker-mailserver to run internally as a relay server. Intended usage: allow a QNAP device (which must be provided a name and password when adding a SMTP service) to send mails in a intranet where authentication is not required and the DNS name of the device is used as the user.

⁠override

This image allows user to sue plain and login auth methods.

⁠details:

• only config files, no *sql database required
• mails are stored in /var/mail/${domain}/${username}
• you should use a data volume container for /var/mail for data persistence
• email login are full email address ([email protected])
• user accounts are managed in ./postfix/accounts.cf
• aliases and forwards/redirects are managed in ./postfix/virtual

⁠installation

docker pull crivella1/docker-mailserver

⁠build

docker build -t crivella1/docker-mailserver .

⁠run

docker run --name mail -v "$(pwd)/postfix":/tmp/postfix -p "25:25" -p "143:143" -p "587:587" -p "993:993" -h mail.my-domain.com -t crivella1/docker-mailserver

⁠docker-compose template (recommended)

mail:
  # image: crivella1/docker-mailserver
  build: .
  hostname: mail
  domainname: my-domain.com
  ports:
  - "25:25"
  - "143:143"
  volumes:
  - ./postfix:/tmp/postfix/

Volumes allow to:

• Manage mail users, passwords and aliases

⁠usage

docker-compose up -d mail

⁠client configuration

# imap
username:               <[email protected]>
password:               <username1password>
server:                 <your-server-ip-or-hostname>
imap port:              143
imap path prefix:       INBOX
auth method:            plain login md5 challenge-response

# smtp
smtp port:              25
username:               <[email protected]>
password:               <username1password>
auth method:            md5 challenge-response