# Basic configuration
compatibility_level = 2
smtpd_banner = $myhostname ESMTP
biff = no
append_dot_mydomain = no
readme_directory = no

# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_tls_security_level = may
smtp_tls_security_level = may
smtpd_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtp_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1

# Network and domain settings
myhostname = CLOUDRON_APP_DOMAIN
myorigin = CLOUDRON_MAIL_DOMAIN
mydestination = CLOUDRON_APP_DOMAIN, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all

# Virtual alias domains
virtual_alias_domains = CLOUDRON_APP_DOMAIN
virtual_alias_maps = tcp:127.0.0.1:11334

# Queue and message settings
message_size_limit = 26214400
mailbox_size_limit = 0
maximal_queue_lifetime = 1d
bounce_queue_lifetime = 1d

# Milter configuration for Rspamd
smtpd_milters = inet:127.0.0.1:11332
non_smtpd_milters = inet:127.0.0.1:11332
milter_protocol = 6
milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}
milter_default_action = accept

# SMTP restrictions
smtpd_recipient_restrictions =
    permit_mynetworks,
    reject_unauth_destination,
    reject_non_fqdn_recipient,
    reject_unknown_recipient_domain

smtpd_helo_restrictions =
    permit_mynetworks,
    reject_invalid_helo_hostname,
    reject_non_fqdn_helo_hostname

smtpd_sender_restrictions =
    permit_mynetworks,
    reject_non_fqdn_sender,
    reject_unknown_sender_domain

# Logging
maillog_file = /dev/stdout