zulip/help/moderating-open-organizatio...

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# Moderating open organizations
An **open organization** is one where
[anyone can join without an invitation](/help/restrict-account-creation#set-whether-invitations-are-required-to-join).
Moderation is a big part of making an open community work.
## Prevention
Zulip has many features designed to simplify moderation by preventing
problematic behavior.
### Manage new users
* Link to a code of conduct in your
[organization description](/help/create-your-organization-profile)
(displayed on the registration page).
* [Disallow disposable email
addresses](/help/restrict-account-creation#dont-allow-disposable-domains)
or [limit authentication
methods](/help/configure-authentication-methods) to increase the
effort for a bad actor to replace a banned account.
* Add a [waiting period](/help/restrict-permissions-of-new-members) before
new users can take disruptive actions.
* Monitor new users by enabling [new user
announcements](/help/configure-automated-notices#new-user-announcements).
### Restrict permissions for making changes
* Restrict who can [create channels](/help/configure-who-can-create-channels), or
monitor new channels by enabling [new channel
announcements](/help/configure-automated-notices#new-channel-announcements).
* Restrict who can [add custom emoji](/help/custom-emoji#change-who-can-add-custom-emoji).
* Restrict who can [move messages to another
channel](/help/restrict-moving-messages#configure-who-can-move-messages-to-another-channel),
and set a [time
limit](/help/restrict-moving-messages#set-a-time-limit-for-editing-topics) for
editing topics.
* Restrict who can
[edit](/help/restrict-message-editing-and-deletion#configure-message-editing-permissions)
and
[delete](/help/restrict-message-editing-and-deletion#configure-message-deletion-permissions)
messages, and set time limits on message editing and deletion.
* If you are concerned about impersonation, you can [prevent users from changing
their name](/help/restrict-name-and-email-changes#restrict-name-changes), or
[require unique
names](/help/restrict-name-and-email-changes#require-unique-names).
### Minimize spam
* [Configure email visibility](/help/configure-email-visibility)
to prevent off-platform spam.
* [Restrict wildcard mentions](/help/restrict-wildcard-mentions)
so only [moderators](/help/roles-and-permissions) can mention everyone in your organization.
* Create a [default channel](/help/set-default-channels-for-new-users)
for announcements where [only admins can
post](/help/channel-posting-policy).
* Configure who can [authorize and start](/help/restrict-direct-messages) direct
message conversations.
## Response
The following features are an important part of an organization's
playbook when responding to abuse or spam that is not prevented by the
organization's policy choices.
* Individual users can [mute abusive users](/help/mute-a-user) to stop
harassment that moderators have not yet addressed, or [collapse
individual messages](/help/collapse-a-message) that they don't want
to see.
* [Ban (deactivate) users](/help/deactivate-or-reactivate-a-user) acting in bad
faith. They will not be able to rejoin using the same email address, unless
their account is reactivated by an administrator.
* Investigate behavior by [viewing messages sent by a
user](/help/view-messages-sent-by-a-user).
* Delete messages, [archive channels](/help/archive-a-channel), and
[unsubscribe users from channels](/help/add-or-remove-users-from-a-channel).
* [Move topics](/help/rename-a-topic), including between channels, when
users start conversations in the wrong place.
* [Change users' names](/help/change-a-users-name) (e.g., to "Name (Spammer)")
for users who sent spam direct messages to many community members.
* [Deactivate bots](/help/deactivate-or-reactivate-a-bot) or
[deactivate custom emoji](/help/custom-emoji#deactivate-custom-emoji).
## Public access option
{!web-public-channels-intro.md!}
## Zulip communities directory
{!communities-directory-intro.md!}
For details on how to get your community listed, see [Communities
directory](/help/communities-directory).
## Related articles
* [Moving to Zulip](/help/moving-to-zulip)
* [Public access option](/help/public-access-option)
* [Communities directory](/help/communities-directory)