Share your mailing groups to ensure everyone communicates with the right people.
By default, a mailing group is only visible to your organization. If you have permission, you can share a mailing group with all users on the project. This improves communication and means each organization no longer needs to maintain their own lists.
A shared mailing group can be used when sending a mail, updating a package distribution list, creating a workflow template, or sending a supplier document package. Mailing groups are shared as read only, which means only the creating organization can edit them to add or remove users.
You'll need to have the Share/Unshare Mailing Groups permission granted to your user role to share a mailing group. If required, project owning organizations can prevent other organizations from sharing mailing groups. Enabling the project preference Allow only Project Owner to share/unshare mailing groups means only the project owner can share them.