Subclasses must call #delete_user_actions inside build_actions to support user deletion. The method adds a delete user bundle, which has a delete and a delete + block option. Every subclass is responsible for implementing these actions.
Next Week should mean next Monday, Next Month - the first day of the next month, and so on.
Also, we'll be using the name "Next Monday" instead of "Next Week" because it's easier to understand. No one can get confused by next Monday.
It was not clear that replace watched words can be used to replace text
with URLs. This introduces a new watched word type that makes it easier
to understand.
Refactors `TrustLevel` and moves translations from server to client
Additional changes:
* "staff" and "admin" wasn't translatable in site settings
* it replaces a concatenated string with a translation
* uses translation for trust levels in users_by_trust_level report
* adds a DB migration to rename keys of translation overrides affected by this commit
When a topic is fully merged into another topic we close it. Now we want also to set a timer for deleting this topic. By default, stub topics will be deleted in 7 days. Users can change this period or disable auto-deleting by setting the period to 0.
This overhauls the user interface for the group email settings management, aiming to make it a lot easier to test the settings entered and confirm they are correct before proceeding. We do this by forcing the user to test the settings before they can be saved to the database. It also includes some quality of life improvements around setting up IMAP and SMTP for our first supported provider, GMail. This PR does not remove the old group email config, that will come in a subsequent PR. This is related to https://meta.discourse.org/t/imap-support-for-group-inboxes/160588 so read that if you would like more backstory.
### UI
Both site settings of `enable_imap` and `enable_smtp` must be true to test this. You must enable SMTP first to enable IMAP.
You can prefill the SMTP settings with GMail configuration. To proceed with saving these settings you must test them, which is handled by the EmailSettingsValidator.
If there is an issue with the configuration or credentials a meaningful error message should be shown.
IMAP settings must also be validated when IMAP is enabled, before saving.
When saving IMAP, we fetch the mailboxes for that account and populate them. This mailbox must be selected and saved for IMAP to work (the feature acts as though it is disabled until the mailbox is selected and saved):
### Database & Backend
This adds several columns to the Groups table. The purpose of this change is to make it much more explicit that SMTP/IMAP is enabled for a group, rather than relying on settings not being null. Also included is an UPDATE query to backfill these columns. These columns are automatically filled when updating the group.
For GMail, we now filter the mailboxes returned. This is so users cannot use a mailbox like Sent or Trash for syncing, which would generally be disastrous.
There is a new group endpoint for testing email settings. This may be useful in the future for other places in our UI, at which point it can be extracted to a more generic endpoint or module to be included.
There are two methods which the server uses to verify an invite is being redeemed with a matching email:
1) The email token, supplied via a `?t=` parameter
2) The validity of the email, as provided by the auth provider
Only one of these needs to be true for the invite to be redeemed successfully on the server. The frontend logic was previously only checking (2). This commit updates the frontend logic to match the server.
This commit does not affect the invite redemption logic. It only affects the 'show' endpoint, and the UI.
The previous commits removed reviewables leading to a bad user
experience. This commit updates the status, replaces actions with a
message and greys out the reviewable.
This PR improves the UI of bulk select so that its context is applied to the Dismiss Unread and Dismiss New buttons. Regular users (not just staff) are now able to use topic bulk selection on the /new and /unread routes to perform these dismiss actions more selectively.
For Dismiss Unread, there is a new count in the text of the button and in the modal when one or more topic is selected with the bulk select checkboxes.
For Dismiss New, there is a count in the button text, and we have added functionality to the server side to accept an array of topic ids to dismiss new for, instead of always having to dismiss all new, the same as the bulk dismiss unread functionality. To clean things up, the `DismissTopics` service has been rolled into the `TopicsBulkAction` service.
We now also show the top Dismiss/Dismiss New button based on whether the bottom one is in the viewport, not just based on the topic count.
When slow mode is enabled it's possible to open the slow mode dialog again to disable it or to update slow mode settings. The problem is that in this case, the button for saving still has the label "Enable" which is confusing.
This changes the text on the button from "Enable" to "Update" when slow mode is already enabled.
Based on feedback from Matt Haughey, we don't need to use so many words when describing a deleted topic or post.
Co-authored-by: Martin Brennan <martin@discourse.org>
It used to allow adding email addresses to a group even if invites were
disabled for the site. This does not allow user to input email address
if they cannot invite.
The second thing this commit improves is the message that is displayed
to the user when they hit the invite rate limit.
We have a few places in the code where we need to validate various email related settings, and will have another soon with the improved group email settings UI. This PR introduces a class which can validate POP3, IMAP, and SMTP credentials and also provide a friendly error message for issues if they must be presented to an end user.
This PR does not change any existing code to use the new service. I have added a TODO to change POP3 validation and the email test rake task to use the new validator post-release.
* FIX: Ensure the same email cannot be invited twice
When creating a new invite with a duplicated email, the old invite will
be updated and returned. When updating an invite with a duplicated email
address, an error will be returned.
* FIX: not Ember helper does not exist
* FIX: Sync can_invite_to_forum? and can_invite_to?
The two methods should perform the same basic set of checks, such as
check must_approve_users site setting.
Ideally, one of the methods would call the other one or be merged and
that will happen in the future.
* FIX: Show invite to group if user is group owner
Currently, when the target is not available we're returning the error message "`You are not permitted to view the requested resource`" which is not clear.
The user may have changed their category or tag tracking settings since a topic was tracked/watched based on those settings in the past. In that case we need to alter the reason message we show them otherwise it is very confusing for the end user to be told they are tracking a topic because of a category, when they are no longer tracking that category.
For example: "You will see a count of new replies because you are tracking this category." becomes: "You will see a count of new replies because you were tracking this category in the past."
To do this, it was necessary to add tag and category tracking info to current user serializer. I improved the serializer code so it only does 3 SQL queries instead of 9 to get the tracking information for tags and categories for the current user.
* FEATURE: add support for like webhooks
Add support for like webhooks. Webhook events only send on user membership
in the defined webhook group filters.
This also fixes group webhook events, as before this was never used, and
the logic was not correct.
This setting allows admin to de/activate automatic trimming of incoming email.
There are instances where it does wonders in trimming all the garbage content and other
instances where it's so bad that it trims the most important part of the email.
FIX: don't remove hidden content using the style attribute when converting HTML to Markdown.
The regexp used was doing more harm than good. It was way too broad.
FIX: properly elide signatures from emails sent with Front App.
This is fairly safe as Front App nicely identifies signatures in the HTML part.
If the "use_site_small_logo_as_system_avatar" setting is enabled, the site's small logo is displayed as the selected option by the avatar-selector. Choosing a different avatar disables the setting.
When the admin creates a new custom field they can specify if that field should be searchable or not.
That setting is taken into consideration for quick search results.
This filter hides reviewables with a score lower than the "reviewable_low_priority_threshold" setting. We only use reviewables that already met this threshold to calculate the Medium and High priority filters.
The old share modal used to host both share and invite functionality,
under two tabs. The new "Share Topic" modal can be used only for
sharing, but has a link to the invite modal.
Among the sharing methods, there is also "Notify" which points out
that existing users will simply be notified (this was not clear
before). Staff members can notify as many users as they want, but
regular users are restricted to one at a time, no more than
max_topic_invitations_per_day. The user will not receive another
notification if they have been notified of the same topic in past hour.
The "Create Invite" modal also suffered some changes: the two radio
boxes for selecting the type (invite or email) have been replaced by a
single checkbox (is email?) and then the two labels about emails have
been replaced by a single one, some fields were reordered and the
advanced options toggle was moved to the bottom right of the modal.
Not all videos can be rendered everywhere because some browser may be
missing some codecs. This commit adds a notice on top of video to let
the user know about it.
The "last custom date and time" shortcut for the topic timer and
bookmarks could get into a state where it had an Invalid Date if
the user opened the topic timer modal, clicked Custom Date and then
closed the modal without making changes. This has been fixed, the
last custom date + time will no longer be set in this case and if
somehow the last custom date + time is invalid that option will not
show.
Also improve the wording from just "Last" to "Last custom datetime"
Previously watched words ignored topic titles when applying auto tagging rules.
Also copy has been improved to reflect how the system behaves.
The text hints that we are only watching first post now
* FEATURE: Review every post using the review queue.
If the `review_every_post` setting is enabled, posts created and edited by regular uses are sent to the review queue so staff can review them. We'll skip PMs and posts created or edited by TL4 or staff users.
Staff can choose to:
- Approve the post (nothing happens)
- Approve and restore the post (if deleted)
- Approve and unhide the post (if hidden)
- Reject and delete it
- Reject and keep deleted (if deleted)
- Reject and suspend the user
- Reject and silence the user
* Update config/locales/server.en.yml
Co-authored-by: Robin Ward <robin.ward@gmail.com>
Co-authored-by: Robin Ward <robin.ward@gmail.com>
* soften language around daily limits and add daily
let's try to be as gentle as we can with new users
* better copy suggestion from Blake
* further copyedit improvements
There is a category setting that enforces 1 or more tags must be added to a topic from a specific tag group before creating it. This validation was not being run before the topic was being sent to a review queue for categories that have that setting enabled.
There was an existing validation in `TopicCreator` but it was not correct; it was only validating when the tags did _not_ exist and also only happened on `create`. I now run the validation in `TopicCreator.valid?`
I also improved the error message shown to the user when they have not added the tags required (showing the tag names from the tag group), and changed the composer tag selector to not show "optional" if there are N tags required from a certain group.
The server used to respond with a generic 'error, contact admin' message
which did not offer any hint what the error was. This happened even when
the error could be easily corrected by the user (for example, if they
chose a very common password).
This PR adds a new category setting which is a column in the `categories` table, `allow_unlimited_owner_edits_on_first_post`.
What this does is:
* Inside the `can_edit_post?` method of `PostGuardian`, if the current user editing a post is the owner of the post, it is the first post, and the topic's category has `allow_unlimited_owner_edits_on_first_post`, then we bypass the check for `LimitedEdit#edit_time_limit_expired?` on that post.
* Also, similar to wiki topics, in `PostActionNotifier#after_create_post_revision` we send a notification to all users watching a topic when the OP is edited in a topic with the category setting `allow_unlimited_owner_edits_on_first_post` enabled.
This is useful for forums where there is a Marketplace or similar category, where topics are created and then updated indefinitely by the OP rather than the OP making new topics or additional replies. In a way this acts similar to a wiki that only one person can edit.
* Fixes the z-index of the prompt so it is behind the quick access panels
* Adds a dismiss `X` button (made sure the click target of this was quite big)
* Change structure of HTML to address template lint issues
* Fix aria-hidden not returning true/false
* Reload current page instead of navigating to / when clicking on the prompt message
We introduced a cap on the number of bookmarks the user can add in be145ccf2f. However this has caused unintended side effects; when the `jobs/scheduled/bookmark_reminder_notifications.rb` runs we get this error for users who already had more bookmarks than the limit:
> Job exception: Validation failed: Sorry, you have too many bookmarks, visit #{url}/my/activity/bookmarks to remove some.
This is because the `clear_reminder!` call was triggering a bookmark validation, which raised an error because the user already had to many, holding up other reminders.
This PR also adds `max_bookmarks_per_user` hidden site setting (default 2000). This replaces the BOOKMARK_LIMIT const so we can raise it for certain sites.
This moves the "This site was just updated" modal asking the user if they want to refresh into a subtle prompt that slides down from the header.
Also in this PR I've added a helper to publish message bus messages in JS tests. So instead of this:
```javascript
// Mimic a messagebus message
MessageBus.callbacks
.filterBy("channel", "/global/asset-version")
.map((c) => c.func("somenewversion"));
```
We can have:
```javascript
publishToMessageBus("/global/asset-version", "somenewversion");
```
This feature used to be controlled by two site settings
enable_personal_email_messages and min_trust_to_send_email_messages.
I removed enable_personal_email_messages and unhide
min_trust_to_send_email_messages to simplify the process of
enabling / disabling this feature.
Changing the invite type from link to email and then copying it was
confusing because it gave user the impression that the invite was
updated and the invite link will reflect the latest changes, but it
did not.
If the user has not been sent any messages, show a message in the quick access menu with an educational message. If the user can send private messages, also show a link to open the "new message" composer:
This also adds a general improvement to the quick-access-panel, to be able to show an `emptyStateWidget` instead of just a message if there is nothing to show in the panel, as well as initial general styles for empty state.
Users can now pin bookmarks from their bookmark list. This will anchor the bookmark to the top of the list, and show a pin icon next to it. This also applies in the nav bookmarks panel. If there are multiple pinned bookmarks they sort by last updated order.
We previously included this option conditionally when users were replying
or creating a new topic while they had content already in the composer.
This makes the dialog always include three buttons:
- Close and discard
- Close and save draft for later
- Keed editing
This also changes how the backend notifies the frontend when there is
a current draft topic. This is now sent via the `has_topic_draft`
property in the current user serializer.
This PR allows invitations to be used when the DiscourseConnect SSO is enabled for a site (`enable_discourse_connect`) and local logins are disabled. Previously invites could not be accepted with SSO enabled simply because we did not have the code paths to handle that logic.
The invitation methods that are supported include:
* Inviting people to groups via email address
* Inviting people to topics via email address
* Using invitation links generated by the Invite Users UI in the /my/invited/pending route
The flow works like this:
1. User visits an invite URL
2. The normal invitation validations (redemptions/expiry) happen at that point
3. We store the invite key in a secure session
4. The user clicks "Accept Invitation and Continue" (see below)
5. The user is redirected to /session/sso then to the SSO provider URL then back to /session/sso_login
6. We retrieve the invite based on the invite key in secure session. We revalidate the invitation. We show an error to the user if it is not valid. An additional check here for invites with an email specified is to check the SSO email matches the invite email
7. If the invite is OK we create the user via the normal SSO methods
8. We redeem the invite and activate the user. We clear the invite key in secure session.
9. If the invite had a topic we redirect the user there, otherwise we redirect to /
Note that we decided for SSO-based invites the `must_approve_users` site setting is ignored, because the invite is a form of pre-approval, and because regular non-staff users cannot send out email invites or generally invite to the forum in this case.
Also deletes some group invite checks as per https://github.com/discourse/discourse/pull/12353
Currently the process of adding a custom image to badge is quite clunky; you have to upload your image to a topic, and then copy the image URL and pasting it in a text field. Besides being clucky, if the topic or post that contains the image is deleted, the image will be garbage-collected in a few days and the badge will lose the image because the application is not that the image is referenced by a badge.
This commit improves that by adding a proper image uploader widget for badge images.
This commit extends functionality of the expired invites tab, making
it more similar to the pending tab. It also implements a different
layout for mobile.
Staff can send a post to the review queue by clicking the "Flag Post" button next to "Take Action...". Clicking it flags the post using the "Notify moderators" score type and hides it. A custom message will be sent to the user.
* FIX: Show resend button only if an email was sent
Otherwise, show the "save and send email" button.
* UX: Copy change
* UX: Show feedback when link was copied
Prior to this change, we had weights for very_high, high, low and
very_low. This means there were 4 weights to tweak and what weights to
use for `very_high/high` and `very_low/low` pair was hard to explain.
This change makes it such that `very_high` search priority will always
ensure that the posts are ranked at the top while `very_low` search
priority will ensure that the posts are ranked at the very bottom.
* FIX: Do not show expired invites under Pending tab
* DEV: Controller action was renamed in previous commit
* FEATURE: Add 'Expired' tab to invites
* FEATURE: Refresh model after removing expired invites
* FEATURE: Do not immediately add invite to the list
Opening the 'create-invite' modal used to automatically generate an
invite to reserve an invite link. If the user did not save it and
closed the modal, the invite would be destroyed. This operations caused
the invite list to change in the background and confuse users.
* FEATURE: Sort redeemed users by creation time
* UX: Improve show / hide advanced options link
* FIX: Show redeemed users even if invites were trashed
* UX: Change modal title when editing invite
* UX: Remove Get Link button
Users can get it from the edit modal
* FEATURE: Add limit for invite links generated by regular users
* FEATURE: Add option to skip email
* UX: Show better error messages
* FIX: Show "Invited by" even if invite was trashed
Follow up to 1fdfa13a099d8e46edd0c481b3aaaafe40455ced.
* FEATURE: Add button to save without sending email
Follow up to c86379a465f28a3cc64a4a8c939cf32cf2931659.
* DEV: Use a buffer to hold all changed data
* FEATURE: Close modal after save
* FEATURE: Rate limit resend invite email
* FEATURE: Make the save buttons smarter
* FEATURE: Do not always send email even for new invites
I made some adjustments to the invite system copy, to reflect the mockups at https://meta.discourse.org/t/improve-invite-system/173756 - the goal is to try to reduce the number of words and make it as simple as possible, similar to discord.
The user interface has been reorganized to show email and link invites
in the same screen. Staff has more control over creating and updating
invites. Bulk invite has also been improved with better explanations.
On the server side, many code paths for email and link invites have
been merged to avoid duplicated logic. The API returns better responses
with more appropriate HTTP status codes.
remove 3 month option for topic timer
move relative time input inside the custom
date and time shortcut
make sure special options are always at the bottom
Add a new year interval option to relative time picker, and also fix some rounding issues (Math.floor is not ideal because it gets rid of half days etc.)
Also adding some component tests here for relative-time-picker.
We were sending 2 emails for user silencing if a message was provided in the UI. Also always send email for user silence and user suspend with reason regardless of whether message provided.
- removes the option from site settings
- deletes the site setting on existing sites that have it
- marks posts using emojis as requiring a rebake
Note that the actual image files are not removed here, the plan is to
remove them in a few weeks/months (when presumably the rebaking of old
posts has been completed).
though other participants are not in allowed list)
If you create an allowlist of users who can PM you, and use the function
“Only specific users can send me private messages”, then you can’t be
added to group messages unless everyone in that message is already in
your allow list.
This commit allows user to be added to a group message even when other
participants are not in allowed list
This commit includes other various improvements to watched words.
auto_silence_first_post_regex site setting was removed because it overlapped
with 'require approval' watched words.
This setting is confusing admins, it is now hidden by default
It only applies to major updates of the rendering engine or imports and
very infrequently needs tweaking
* A11Y: Improve the header menu "view all" title.
The title attribute has been used to attempt to provide the link with an accessible name, but the value of the title attribute is “view all” for the link in each of the tabs, and so their purpose is not uniquely identified.
This PR adds an edit button to the topic timer info message which opens the modal.
Also, I have cleaned up a few more places where we were referencing "topic status update" which is what these were called prior to being called topic timers.
The category settings for auto-close topic hours has now also been modified to use the new relative-time-picker component.
Finally, the relative-time-picker input step and min is dynamic based on mins/other intervals selected, see https://review.discourse.org/t/feature-relative-time-input-for-timers-and-bookmarks-and-promote-auto-close-after-last-post-timer-12063/19204/7?u=martin
This PR adds a new relative-time component, that is an input box with a SK dropdown of minutes, hours, days, and months which outputs the duration selected in minutes. This new component is used in the time shortcuts list (used by bookmarks and topic timers) as a new Relative Time shortcut.
Also in this PR, I have made the "Auto-Close After Last Post" timer into a top level timer type in the UI, and removed the "based on last post" custom time shortcut.
* DEV: Show warning message when using ember css selectors
When editing the theme css via the admin UI a warning message
will be displayed if it detects that the `#emberXXX` or `.ember-view`
css selectors are being used. These are dynamic selectors that ember
generates, but they can change so they should not be used.
* Update error message text to be more helpful
* Display a warning instead of erroring out
This allows the theme to still be saved, but a warning is displayed.
Updated the tests to check for the error message.
Updated the pre tags css so that it wraps for long messages.
This commit adjusts the scroll gradient on the login modal, changes `email / username` to `Email / Username` and adjusts the color of social button icons on hover in the login modal.
The 'Discourse SSO' protocol is being rebranded to DiscourseConnect. This should help to reduce confusion when 'SSO' is used in the generic sense.
This commit aims to:
- Rename `sso_` site settings. DiscourseConnect specific ones are prefixed `discourse_connect_`. Generic settings are prefixed `auth_`
- Add (server-side-only) backwards compatibility for the old setting names, with deprecation notices
- Copy `site_settings` database records to the new names
- Rename relevant translation keys
- Update relevant translations
This commit does **not** aim to:
- Rename any Ruby classes or methods. This might be done in a future commit
- Change any URLs. This would break existing integrations
- Make any changes to the protocol. This would break existing integrations
- Change any functionality. Further normalization across DiscourseConnect and other auth methods will be done separately
The risks are:
- There is no backwards compatibility for site settings on the client-side. Accessing auth-related site settings in Javascript is fairly rare, and an error on the client side would not be security-critical.
- If a plugin is monkey-patching parts of the auth process, changes to locale keys could cause broken error messages. This should also be unlikely. The old site setting names remain functional, so security-related overrides will remain working.
A follow-up commit will be made with a post-deploy migration to delete the old `site_settings` rows.
`emailOrUsername` was renamed to `invitee` in a recent change to app/assets/javascripts/discourse/app/components/invite-panel.js and needed to be updated in client.en.yml
Issue originally reported in https://meta.discourse.org/t/bypass-sso-by-adding-unkown-email-to-group/177339
Inviting people via email address to a group when SSO is enabled (or local logins are disabled) led to a situation where user records were being created bypassing single sign-on.
We already prevent that in most places. This adds required checks to `GroupsController`.
This pull requests contains a series of improvements to groups
settings and member management such as:
- Showing which users have set a group as primary
- Moving similar settings together under Effects
- Adding bulk select and actions to members page
This PR revamps the topic timer UI, using the time shortcut selector from the bookmark modal.
* Fixes an issue where the duration of hours/days after last reply or auto delete replies was not enforced to be > 0
* Fixed an issue where the timer dropdown options were not reloaded correctly if the topic status changes in the background (use `MessageBus` to publish topic state in the open/close timer jobs)
* Moved the duration input and the "based on last post" option from the `future-date-input` component, as it was only used for topic timers. Also moved out the notice that is displayed which was also only relevant for topic timers.
Disabling shared drafts used to leave topics in an inconsistent state
where they were not displayed as shared drafts and thus there was no
way of publishing them. Moreover, they were accessible just to users
who have permissions to create shared drafts.
This commit adds another permission check that is used for most
operations and the old can_create_shared_draft? remains used just when
creating a new shared draft.
This PR is the first step towards replacing our `{{user-selector}}` and eventually deprecating and removing it from our codebase. Some of `{{user-selector}}` problems are:
1. It's called `{{user-selector}}`, but in reality in can also select groups and emails.
2. It's an Ember component, yet it doesn't have a handlebars template and uses jQuery to render itself and modify the DOM. An example of this problem is when you want to clear the selected users programmatically, see [this](6c155dba77/app/assets/javascripts/discourse/app/components/user-selector.js (L179-L185)).
3. We now have select kit which does very similar things but a lot better.
This PR introduces `{{email-group-user-chooser}}` which is meant to replace `{{user-selector}}`. It extends select kit and has the same features that `{{user-selector}}` has. `{{user-selector}}` is still used in a few places in core, but they'll all be replaced with the new component in a separate commit.
Once `{{user-selector}}` is not used anywhere in core, it'll be deprecated and then removed after the 2.7 release.
This PR moves all of the time picking functionality from the bookmark modal and controller into a reusable time-shortcut-picker component, which will be used for the topic timer UI revamp. All of the utility JS for getting dates like tomorrow/next week/next month etc. have also been moved into a separate utility lib.
The time-shortcut-picker has a couple of options that can be passed in:
* prefilledDatetime - The date and time to parse and prefill into the custom date and time section, useful for editing interfaces.
* onTimeSelected (callback) - Called when one of the time shortcuts is clicked, and passes the type of the shortcut (e.g. tomorrow) and the datetime selected.
* additionalOptionsToShow - An array of option ids to show (by default `later_today` and `later_this_week` are hidden)
* hiddenOptions - An array of option ids to hide
* customOptions - An array of custom options to display (e.g. the option to select a post date for the bookmarks modal). The options should have the below properties:
* id
* icon
* label (I18n key)
* time (moment datetime object)
* timeFormatted
* hidden
The other major work in this PR is moving all of the bookmark functionality out of the bookmark modal controller and into its own component, where it makes more sense to be able to access elements on the page via `document`. Tests have been added to accompany this move, and existing acceptance tests for bookmark are all passing.
Adds a new column/setting to groups, allow_unknown_sender_topic_replies, which is default false. When enabled, this scenario is allowed via IMAP:
* OP sends an email to the support email address which is synced to a group inbox via IMAP, creating a group topic
* Group user replies to the group topic
* An email notification is sent to the OP of the topic via GroupSMTPMailer
* The OP has several email accounts and the reply is sent to all of them, or they forward their reply to another email account
* The OP replies from a different email address than the OP (gloria@gmail.com instead of gloria@hey.com for example)
* The a new staged user is created, the new reply is accepted and added to the topic, and the staged user is added to the topic allowed users
Without allow_unknown_sender_topic_replies enabled the new reply creates an entirely new topic (because the email address it is sent from is not previously part of the topic email chain).