Inbound mail on support@top-sysops.ru creates/updates tickets in realtime
(IMAP IDLE, not polling). Replies thread via In-Reply-To/References against
stored Message-IDs, falling back to the customer's open ticket. Mailbox
credentials configured and encrypted via Settings -> Почта, same pattern as
the Telegram channel. TLS verification is opt-in-skippable per mailbox
(mail.top-sysops.ru's cert is currently expired; LAN-only server).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QcXH24ky6zjk2UyK5oZUPH
