docker-compose.yml

version: "3.5"
services:
  maddy:
    image: foxcpp/maddy:latest
    restart: unless-stopped
    ports:
      - "25:25"
      - "143:143"
      - "587:587"
      - "993:993"
    volumes:
      - ./maddydata:/data
    environment:
        # REPLACE DOMAINS WITH YOURS
      - MADDY_HOSTNAME=mx.example.com
      - MADDY_DOMAIN=example.com

  php:
    image: php:8.1-fpm-alpine
    restart: unless-stopped
    volumes:
      - ./snappymail:/var/www

  nginx:
    image: nginx:latest
    restart: unless-stopped
    depends_on:
      - php
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./snappymail:/var/www
      - ./nginx/ssl:/etc/nginx/ssl
      - ./nginx/default.conf:/etc/nginx/conf.d/default.conf

maddy.conf 放入maddydata文件夹

## Maddy Mail Server - default configuration file (2022-06-18)
## This is the copy of maddy.conf with changes necessary to run it in Docker.
# Suitable for small-scale deployments. Uses its own format for local users DB,
# should be managed via maddyctl utility.
#
# See tutorials at https://maddy.email for guidance on typical
# configuration changes.

# ----------------------------------------------------------------------------
# Base variables

$(hostname) = {env:MADDY_HOSTNAME}
$(primary_domain) = {env:MADDY_DOMAIN}
$(local_domains) = $(primary_domain) 

tls file /data/tls/fullchain.pem /data/tls/privkey.pem

# ----------------------------------------------------------------------------
# Local storage & authentication

# pass_table provides local hashed passwords storage for authentication of
# users. It can be configured to use any "table" module, in default
# configuration a table in SQLite DB is used.
# Table can be replaced to use e.g. a file for passwords. Or pass_table module
# can be replaced altogether to use some external source of credentials (e.g.
# PAM, /etc/shadow file).
#
# If table module supports it (sql_table does) - credentials can be managed
# using 'maddyctl creds' command.

auth.pass_table local_authdb {
    table sql_table {
        driver sqlite3
        dsn credentials.db
        table_name passwords
    }
}

# imapsql module stores all indexes and metadata necessary for IMAP using a
# relational database. It is used by IMAP endpoint for mailbox access and
# also by SMTP & Submission endpoints for delivery of local messages.
#
# IMAP accounts, mailboxes and all message metadata can be inspected using
# imap-* subcommands of maddyctl utility.

storage.imapsql local_mailboxes {
    driver sqlite3
    dsn imapsql.db
}

# ----------------------------------------------------------------------------
# SMTP endpoints + message routing

hostname $(hostname)

table.chain local_rewrites {
    optional_step regexp "(.+)\+(.+)@(.+)" "$1@$3"
    optional_step static {
        entry postmaster postmaster@$(primary_domain)
    }
    optional_step file /etc/maddy/aliases
}

msgpipeline local_routing {
    # Insert handling for special-purpose local domains here.
    # e.g.
    # destination lists.example.org {
    #     deliver_to lmtp tcp://127.0.0.1:8024
    # }

    destination postmaster $(local_domains) {
        modify {
            replace_rcpt &local_rewrites
        }

        deliver_to &local_mailboxes
    }

    default_destination {
        reject 550 5.1.1 "User doesn't exist"
    }
}

smtp tcp://0.0.0.0:25 {
    limits {
        # Up to 20 msgs/sec across max. 10 SMTP connections.
        all rate 20 1s
        all concurrency 10
    }

    dmarc yes
    check {
        require_mx_record
        dkim
        spf
    }

    source $(local_domains) {
        reject 501 5.1.8 "Use Submission for outgoing SMTP"
    }
    default_source {
        destination postmaster $(local_domains) {
            deliver_to &local_routing
        }
        default_destination {
            reject 550 5.1.1 "User doesn't exist"
        }
    }
}

submission tls://0.0.0.0:465 tcp://0.0.0.0:587 {
    limits {
        # Up to 50 msgs/sec across any amount of SMTP connections.
        all rate 50 1s
    }

    auth &local_authdb

    source $(local_domains) {
        check {
            authorize_sender {
                prepare_email &local_rewrites
                user_to_email identity
            }
        }

        destination postmaster $(local_domains) {
            deliver_to &local_routing
        }
        default_destination {
            modify {
                dkim $(primary_domain) $(local_domains) default
            }
            deliver_to &remote_queue
        }
    }
    default_source {
        reject 501 5.1.8 "Non-local sender domain"
    }
}

target.remote outbound_delivery {
    limits {
        # Up to 20 msgs/sec across max. 10 SMTP connections
        # for each recipient domain.
        destination rate 20 1s
        destination concurrency 10
    }
    mx_auth {
        dane
        mtasts {
            cache fs
            fs_dir mtasts_cache/
        }
        local_policy {
            min_tls_level encrypted
            min_mx_level none
        }
    }
}

target.queue remote_queue {
    target &outbound_delivery

    autogenerated_msg_domain $(primary_domain)
    bounce {
        destination postmaster $(local_domains) {
            deliver_to &local_routing
        }
        default_destination {
            reject 550 5.0.0 "Refusing to send DSNs to non-local addresses"
        }
    }
}

# ----------------------------------------------------------------------------
# IMAP endpoints

imap tls://0.0.0.0:993 tcp://0.0.0.0:143 {
    auth &local_authdb
    storage &local_mailboxes
}

SSL 证书

maddydata/tls/fullchain.pem
maddydata/tls/privkey.pem
/nginx/ssl/

nginx 配置文件

下载 https://github.com/the-djmaze/snappymail/blob/master/.docker/dev/nginx/default.conf
放入nginx 并修改

dkim

域名添加txt 记录 default._domainkey
复制 maddydata/dkim/example.com_default.dns 填入

添加账户

docker-compose exec maddy maddyctl creds create foxcpp@maddy.test
docker-compose exec maddy maddyctl imap-acct create foxcpp@maddy.test

snappymail 配置

mx.example.com/?admin 打开管理面板 用户admin 密码在snappymail/data/_data_/_default_/

php权限

chown 82:82 snappymail -R

已知问题

snappymail 发信不保存到已发送邮件，暂时不了解是maddy的问题还是snappymail问题，Linux Geary 发信是可以保存的

内存占用真的很少