services/nextcloud/docker-compose.smtp.yml

version: "3.8"

services:
  nextcloud-fpm:
    environment:
      &smtp-configuration
      NC_mail_smtphost: ${NC_mail_smtphost:?err} # The hostname of the SMTP server.
      NC_mail_smtpsecure: ${NC_mail_smtpsecure:-ssl} # Set to ssl to use SSL, or tls to use STARTTLS.
      NC_mail_smtpport: ${NC_mail_smtpport:-465}
      NC_mail_smtpauthtype: ${NC_mail_smtpauthtype:-LOGIN}
      NC_mail_smtpname: ${NC_mail_smtpname:?err}
      NC_mail_smtppassword: ${NC_mail_smtppassword:?err}
      NC_mail_from_address: ${NC_mail_from_address:?err}
      NC_mail_domain: ${NC_mail_domain:?err}

  nextcloud-cron:
    environment:
      <<: *smtp-configuration