make it podman-compatible

Containerfile

@@ -1,4 +1,5 @@
-FROM golang:1.19-alpine AS build-env
+### Builds maddy-hostux-check-password
+FROM docker.io/golang:1.19-alpine AS build-env
 
 # Required for mattn/go-sqlite3
 ENV CGO_ENABLED=1
@@ -16,6 +17,11 @@ COPY . ./
 
 RUN make
 
-FROM foxcpp/maddy:0.6
+### Copies maddy-hostux-check-password and maddy.conf to the final image
+FROM docker.io/foxcpp/maddy:0.7.1
 
 COPY --from=build-env /maddy-hostux-check-password/build/maddy-hostux-check-password /bin/maddy-hostux-check-password
+
+COPY ./maddy.conf.docker /etc/maddy/maddy.conf
+
+ENTRYPOINT ["/bin/maddy", "-config", "/etc/maddy/maddy.conf"]

README.md

@@ -7,6 +7,7 @@ Features:
 Configuration through environment variables:
 * `HOSTUX_EMAIL_DATABASE_SQLITE`: required, path to the database containing the email addresses
 * `HOSTUX_EMAIL_CHECKPW_LOGFILE`: if set, logs are written to the path indicated
+* `HOSTUX_LOCAL_DOMAINS`: to complete `$(local_domains)` list (necessary for outbound DKIM signing, and w/ current `maddy.conf.docker`, for destination and source matching)
 
 ## Testing
 
@@ -14,7 +15,7 @@ Configuration through environment variables:
 
 Build the image:
 ```bash
-docker build -f Containerfile -t hostux/maddy:latest .
+podman build -t hostux/maddy:latest .
 ```
 
 For `maddy.conf`:
@@ -93,20 +94,19 @@ imap tcp://0.0.0.0:143 {
 ```
 
 ```bash
-docker volume create maddydata
+podman volume create maddydata
-docker network create maddy-test
 
-docker run --rm \
+podman run --rm \
   --name maddy \
   -e MADDY_HOSTNAME=mx.maddy.test \
   -e MADDY_DOMAIN=maddy.test \
-  -e HOSTUX_EMAIL_DATABASE_SQLITE=/email.sqlite \
+  -e HOSTUX_EMAIL_DATABASE_SQLITE=/data/email-db/email.sqlite \
   -v maddydata:/data \
-  -v ~/maddy-hostux-check-password/email.sqlite:/email.sqlite \
+  -v email-db:/data/email-db/ \
   -p 143:143 \
   hostux/maddy:latest
 
-docker run --rm -it -v maddydata:/data --entrypoint ash foxcpp/maddy:0.6
+podman run --rm -it -v maddydata:/data --entrypoint ash foxcpp/maddy:0.6
 ```
 
 ### CLI Imap Client

maddy.conf.docker

@@ -0,0 +1,203 @@
+### Hostux
+###  2022-06-18 Original default configuration file with changes necessary to run it in Docker
+###  2024-03-16 Adapted configuration file from https://raw.githubusercontent.com/foxcpp/maddy/master/maddy.conf.docker
+
+
+# Suitable for small-scale deployments. Uses its own format for local users DB,
+# should be managed via maddy subcommands.
+#
+# 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) = $(primary_domain) {env:HOSTUX_DOMAINS_WITH_DKIM}
+
+tls file /certs/live/$(hostname)/fullchain.pem /certs/live/$(hostname)/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 'maddy creds' command.
+
+auth.external hostux_auth {
+    helper /bin/maddy-hostux-check-password
+    perdomain yes
+    domains $(local_domains)
+}
+
+# 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 maddy.
+
+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 sql_query {
+        driver sqlite3
+        dsn {env:HOSTUX_EMAIL_DATABASE_SQLITE}
+        lookup "SELECT aliasTo_emailAddress FROM email-aliases WHERE emailAlias = $1"
+    }
+}
+
+#table.sql_query hostux_destinations {
+#    driver sqlite3
+#    dsn {env:HOSTUX_EMAIL_DATABASE_SQLITE}
+#    lookup "SELECT emailAddress AS address FROM `email-addresses`
+#            WHERE address = $1
+#            UNION
+#            SELECT emailAlias AS address FROM `email-aliases`
+#            WHERE address = $1"
+#}
+
+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
+    # }
+
+    check {
+        rspamd {
+            api_path {env:RSPAMD_SERVER}
+        }
+    }
+
+    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 &hostux_auth
+
+    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 &hostux_auth
+    storage &local_mailboxes
+}