Outbound (SMTP)

Integration-level email (dashboard replies to subscribers, optional welcome emails after a new form subscription when an On-Event campaign is configured) is sent only through SMTP settings stored on that integration (dashboard: Connection & settings → Outbound email (SMTP)).

Platform vs integration

• Global SMTP (API environment variables GLOBAL_SMTP_*, GLOBAL_MAIL_FROM) is reserved for operator / platform notifications only. It is not used for subscriber-facing mail from an integration.
• No fallback: if integration SMTP is missing, invalid, or sending fails, Mailoo does not substitute the global mailer. Dashboard Create reply returns an error when SMTP is not configured; welcome emails are skipped and logged when SMTP is unavailable.

Security

SMTP passwords for integrations are stored encrypted (API env MAIL_SMTP_ENCRYPTION_KEY). The API never returns the ciphertext or plaintext password to clients; responses may include hasSmtpPassword only.

See ../../../development/environment{.interpreted-text role="doc"} for variable names.