- Access-based Groups
- Manage Guest Memberships
- Smart Email Delivery
- Moderators
- Group-level Spam Protection
Access-based Groups
Different kinds of groups based on access level can be created for an organization with or without moderation.![Access-based Groups](http://www.zohowebstatic.com/sites/zweb/images/mail/access-level.png)
![Manage Guest Memberships](http://www.zohowebstatic.com/sites/zweb/images/mail/add-members.png)
Manage Guest Memberships
Add members to a group, even if they are not part of the organization. This can include customers, partners, suppliers, and more.Smart Email Delivery
A user can be part of any number of groups and if a particular email is sent to multiple groups to which a user is a member, Zoho Mail will intelligently deliver only one copy.![Smart Email Delivery](http://www.zohowebstatic.com/sites/zweb/images/mail/smart-delivery.png)
![Moderators](http://www.zohowebstatic.com/sites/zweb/images/mail/moderators.png)
Moderators
Establish unmoderated groups, or groups with one or multiple moderators. A moderator-flagged spam tag can be propagated to the other members in the group.Group-level Spam Protection
Group moderators can decide on what messages are relevant and only messages approved by them are sent to group members. Group access restrictions and moderator spam-flag that reflects on member's mailboxes ensure maximum spam protection and awareness.![Group-level Spam Protection](http://www.zohowebstatic.com/sites/zweb/images/mail/group-spamcontrol.png)