initial commit

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

roles/mail/templates/mailserver.env.j2

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+DMS_DEBUG=0
+# PERMIT_DOCKER=network
+
+# Hostname + primary domain (split from mail_hostname variable)
+HOSTNAME={{ mail_hostname.split('.')[0] }}
+DOMAINNAME={{ domain }}
+
+# Let's Encrypt
+ENABLE_TLS=1
+SSL_TYPE=letsencrypt
+LETSENCRYPT_DOMAIN={{ mail_hostname }}
+LETSENCRYPT_EMAIL={{ admin_user }}@{{ domain }}
+
+# Override hostname (FQDN) and domains handled by this server
+OVERRIDE_HOSTNAME={{ mail_hostname }}
+OVERRIDE_DOMAIN={{ mail_domains | join(',') }}
+
+# Other docker-mailserver options
+POSTMASTER_ADDRESS=postmaster@{{ domain }}
+ONE_DIR=1
+ENABLE_OPENDKIM=0
+# rspamd handles DMARC and SPF natively; enabling these would duplicate validation
+ENABLE_OPENDMARC=0
+ENABLE_POLICYD_SPF=0
+ENABLE_AMAVIS=0
+ENABLE_CLAMAV=0
+ENABLE_FAIL2BAN=0
+ENABLE_SPAMASSASSIN=0
+ENABLE_RSPAMD=1
+
+RSPAMD_LEARN=1
+
+POSTFIX_MESSAGE_SIZE_LIMIT=26214400