option-set
services.postfix.settings.main
Options
services.postfix.settings.main.message_size_limitservices.postfix.settings.main.mydestinationservices.postfix.settings.main.myhostnameservices.postfix.settings.main.mynetworksservices.postfix.settings.main.mynetworks_styleservices.postfix.settings.main.recipient_delimiterservices.postfix.settings.main.relay_domainsservices.postfix.settings.main.relayhostservices.postfix.settings.main.smtp_tls_CAfileservices.postfix.settings.main.smtp_tls_security_levelservices.postfix.settings.main.smtpd_tls_chain_filesservices.postfix.settings.main.smtpd_tls_security_level