#
# !!! This file is managed by Ansible !!!
#


## maddy 0.4 - default configuration file

log syslog /var/log/maddy.log

# ----------------------------------------------------------------------------
# Base variables
$(hostname) = {{services.maddy.hostname}} 
$(primary_domain) = ctu.cx
$(local_domains) = $(hostname) $(primary_domain) antifa.jetzt thein.ovh ctucx.de trans-agenda.de

tls file {{services.maddy.ssl_cert}} {{services.maddy.ssl_privkey}}

# ----------------------------------------------------------------------------
# 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)

msgpipeline local_routing {
    dmarc yes
    check {
        require_mx_record
        dkim
        spf
    }

    # 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 $(local_domains) {
        modify {
            replace_rcpt static {
               entry postmaster           postmaster@$(primary_domain)
               entry leon@thein.ovh       leah@ctu.cx
               entry leah@thein.ovh       leah@ctu.cx
               entry leah@antifa.jetzt    leah@ctu.cx
            }

            # Implement plus-address notation.
            replace_rcpt regexp "(.+)\+(.+)@(.+)" "$1@$3"

            replace_rcpt regexp "(.+)@ctucx.de" "leah@ctu.cx"
            replace_rcpt regexp "(.+)@ctu.cx"   "leah@ctu.cx"
        }

        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
    }

    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) {
        destination postmaster $(local_domains) {
            deliver_to &local_routing
        }

        default_destination {
            modify {
                dkim $(primary_domain) $(local_domains) default {
                	newkey_algo ed25519
                }
            }
            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
    max_parallelism 16
    max_tries 4

    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
}