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iachat/app/models/concerns
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Vishnu Narayanan c884cdefde
feat: add per-account daily rate limit for outbound emails (#13411) 
Introduce a daily cap on non-channel outbound emails to prevent abuse.

Fixes https://linear.app/chatwoot/issue/CW-6418/ses-incident-jan-28

## Type of change

- [x] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality not to work as expected)

## Summary
- Adds a Redis-based daily counter to rate limit outbound emails per
account, preventing email abuse
- Covers continuity emails (WebWidget/API), conversation transcripts,
and agent notifications
  - Email channel replies are excluded (paid feature, not abusable)
- Adds account suspension check in `ConversationReplyMailer` to block
already-queued emails for suspended accounts

  ## Limit Resolution Hierarchy
1. Per-account override (`account.limits['emails']`) — SuperAdmin
configurable
2. Enterprise plan-based (`ACCOUNT_EMAILS_PLAN_LIMITS`
InstallationConfig)
3. Global default (`ACCOUNT_EMAILS_LIMIT` InstallationConfig, default:
100)
  4. Fallback (`ChatwootApp.max_limit` — effectively unlimited)

  ## Enforcement Points
  | Path | Where | Behavior |
  |------|-------|----------|
| WebWidget/API continuity |
`SendEmailNotificationService#should_send_email_notification?` |
Silently skipped |
| Widget transcript | `Widget::ConversationsController#transcript` |
Returns 429 |
| API transcript | `ConversationsController#transcript` | Returns 429 |
| Agent notifications | `Notification::EmailNotificationService#perform`
| Silently skipped |
  | Email channel replies | Not rate limited | Paid feature |
| Suspended accounts | `ConversationReplyMailer` | Blocked at mailer
level |
2026-02-03 02:06:51 +05:30
..
.keep Initial Commit 2019-08-14 15:18:44 +05:30
access_tokenable.rb Chore: Replaced dependent destroy with dependent destroy_async in all models (#3249) 2021-11-18 10:32:29 +05:30
account_cache_revalidator.rb feat: expiry for cache keys [CW-3038] (#8793) 2024-01-29 15:27:26 +05:30
account_email_rate_limitable.rb feat: add per-account daily rate limit for outbound emails (#13411) 2026-02-03 02:06:51 +05:30
activity_message_handler.rb fix: I18n::MissingInterpolationArgument for assignee activity messages (#12617) 2025-10-08 18:39:51 +05:30
assignment_handler.rb feat: Add support for multi-language support for Captain (#11068) 2025-03-19 18:25:33 -07:00
auto_assignment_handler.rb feat: Assignment service (v2) (#12320) 2025-11-17 10:08:25 +05:30
availability_statusable.rb chore: Move agent availability to Account level (#3074) 2021-10-07 13:21:46 +05:30
avatarable.rb chore: Upgrade to Rails 7 (#6719) 2023-05-06 10:44:52 +05:30
cache_keys.rb feat: expiry for cache keys [CW-3038] (#8793) 2024-01-29 15:27:26 +05:30
captain_featurable.rb feat: add global config for captain settings (#13141) 2026-01-12 19:54:19 +05:30
channelable.rb chore: Centralize outgoing message reply restrictions for all the channels (#11279) 2025-04-12 08:52:12 +05:30
content_attribute_validator.rb chore: Upgrade rails and ruby versions (#2400) 2021-08-03 20:11:52 +05:30
conversation_mute_helpers.rb fix: prevent NoMethodError in mute helpers when contact is nil (#13277) 2026-01-15 22:00:09 -08:00
featurable.rb chore: Enable the new Rubocop rules (#7122) 2023-05-19 14:37:10 +05:30
inbox_agent_availability.rb feat: Assignment service (v2) (#12320) 2025-11-17 10:08:25 +05:30
json_schema_validator.rb feat: Add support for minutes in auto resolve feature (#11269) 2025-05-07 00:36:15 -07:00
label_activity_message_handler.rb feat: add activity message for SLA (#9100) 2024-03-13 20:05:34 +05:30
labelable.rb feat: Add support for labels in automations (#11658) 2025-09-18 14:17:54 +05:30
liquidable.rb feat: Add liquid template support for WhatsApp template parameters (#12227) 2025-08-21 16:44:51 +05:30
llm_formattable.rb chore: Update LLM formatter classes to include additional details (#11491) 2025-05-15 17:47:37 -07:00
message_filter_helpers.rb feat: Enable sending template messages in webhooks (#7252) 2023-06-05 20:27:28 +05:30
out_of_offisable.rb Fix: add option to choose 24 hour working slot (#4018) 2022-02-22 01:28:49 -08:00
priority_activity_message_handler.rb chore(i18n): Improvements in automation and macros (#11231) 2025-04-02 15:48:42 -07:00
pubsubable.rb chore: Rotate pubsub token on password change (#7194) 2023-05-27 13:24:31 +05:30
push_data_helper.rb feat: UI to show the SLA threshold in chat screen (#9146) 2024-04-04 15:46:46 +05:30
reauthorizable.rb feat: TikTok channel (#12741) 2025-12-17 07:54:50 -08:00
reportable.rb Chore: clean up Reporting Events (#4044) 2022-02-28 18:16:12 +05:30
sla_activity_message_handler.rb feat: add activity message for SLA (#9100) 2024-03-13 20:05:34 +05:30
sort_handler.rb feat: Add support for ascending and descending options in sort (#8542) 2023-12-12 17:15:48 -08:00
sso_authenticatable.rb feat: Prevent saving preferences and status when impersonating (#11164) 2025-05-20 17:34:30 -07:00
team_activity_message_handler.rb feat: add activity message for SLA (#9100) 2024-03-13 20:05:34 +05:30
user_attribute_helpers.rb chore: Account switching issue in newly added accounts (#12403) 2025-09-10 14:12:22 +05:30