IPv4 binding¶

To adjust one or multiple IPv4 bindings, open mailcow.conf and edit one, multiple or all variables as per your needs:

```

For technical reasons, http bindings are a bit different from other service bindings.¶

You will find the following variables, separated by a bind address and its port:¶

Example: HTTP_BIND=1.2.3.4¶

HTTP_PORT=80 HTTP_BIND= HTTPS_PORT=443 HTTPS_BIND=

Other services are bound by using the following format:¶

SMTP_PORT=1.2.3.4:25 will bind SMTP to the IP 1.2.3.4 on port 25¶

Important! Specifying an IPv4 address will skip all IPv6 bindings since Docker 20.x.¶

doveadm, SQL as well as Solr are bound to local ports only, please do not change that, unless you know what you are doing.¶

SMTP_PORT=25 SMTPS_PORT=465 SUBMISSION_PORT=587 IMAP_PORT=143 IMAPS_PORT=993 POP_PORT=110 POPS_PORT=995 SIEVE_PORT=4190 DOVEADM_PORT=127.0.0.1:19991 SQL_PORT=127.0.0.1:13306 SOLR_PORT=127.0.0.1:18983 ```

To apply your changes, run docker-compose down followed by docker-compose up -d.

IPv6 binding¶

Changing IPv6 bindings is different from IPv4. Again, this has a technical background.

A docker-compose.override.yml file will be used instead of editing the docker-compose.yml file directly. This is to maintain updatability, as the docker-compose.yml file gets updated regularly and your changes will most likely be overwritten.

Edit to create a file docker-compose.override.yml with the following content. Its content will be merged with the productive docker-compose.yml file.

An imaginary IPv6 2a00:dead:beef::abc is given. The first suffix :PORT1 defines the external port, while the second suffix :PORT2 routes to the corresponding port inside the container and must not be changed.

``` version: '2.1' services:

dovecot-mailcow:
  ports:
    - '2a00:dead:beef::abc:143:143'
    - '2a00:dead:beef::abc:993:993'
    - '2a00:dead:beef::abc:110:110'
    - '2a00:dead:beef::abc:995:995'
    - '2a00:dead:beef::abc:4190:4190'

postfix-mailcow:
  ports:
    - '2a00:dead:beef::abc:25:25'
    - '2a00:dead:beef::abc:465:465'
    - '2a00:dead:beef::abc:587:587'

nginx-mailcow:
  ports:
    - '2a00:dead:beef::abc:80:80'
    - '2a00:dead:beef::abc:443:443'

```

To apply your changes, run docker-compose down followed by docker-compose up -d.

Last update: 2022-01-30 15:54:10