FlowSphera 1.6.4 release notes

E-mail notifications. Settings → Events → Notifications now has tabs Telegram | E-mail. Any SMTP server or service: STARTTLS, SSL/TLS or none, the server certificate verified by default, an optional login, several recipients. One letter per 10-minute check (HTML with a plain-text part), critical first, with a link to the Events page; Send a test checks the way and explains what went wrong (login, recipients, STARTTLS, certificate, port).
Each channel has its own switch, minimum priority, language, hourly limit and kinds (an E-mail column next to the Telegram one in the detections table), and sends from its own thread: a mail server that does not answer never holds up the detections or Telegram. The FlowTrack address for links is shared by the channels.
The SMTP password is kept like the bot token: in /var/lib/flowtrack/notify.json (readable by the service only), never sent to the browser (the field shows "saved") and never written to the log.