Claim and verify your organisation’s email domain(s) to make your workspace or Enterprise Grid organisation more secure. When you claim an email domain, it will appear as the only option for members to accept Slack Connect invitations. On the Enterprise Grid subscription, you can also prevent your members from joining external workspaces using an email address from a restricted company domain.
Claim and verify domains
Pro and Business+ subscriptions
Enterprise Grid subscription
When you claim email domains, your members will only be able to accept Slack Connect invitations from domains that you have claimed. This ensures that members can only accept Slack Connect invitations from the workspaces that you manage.
From your desktop, click your workspace name in the sidebar.
Select Tools & settings, then click on Workspace settings.
Select Email domains in the left sidebar. If you don’t see the left sidebar, click Menu in the top-left corner to find it.
Click on Add domain.
In the domain field, enter the domain (or wildcard domain) that you’d like to verify, then click Next.
You'll need access to a domain name system (DNS) to confirm that the domain belongs to your organisation. Follow instructions provided by your domain hosting service to create a DNS TXT record (for Host, use @ if the domain is not a wildcard and _slack-challenge if it is). It may take up to 72 hours for changes to take effect.
After confirming that your TXT record has been added to your DNS, return to Email domains on your Slack admin dashboard.
Next to a domain, select Verify domain in the status column, then click Next. If you'd like, set your org as the primary organisation for Slack Connect.
When you verify and restrict email domains, you can choose to limit your members’ ability to join new workspaces in the following ways:
Accepting Slack Connect invitations Your members will only be able to accept Slack Connect invitations from domains that you have claimed. This ensures that members can only accept Slack Connect invitations from the workspaces that you manage.
Joining external workspaces Members of other workspaces won’t be able to send invitations to email addresses on domains that your organisation has claimed. If you claim a domain after an invitation has been sent, your members won’t be able to accept it.
From your desktop, click your workspace name in the sidebar.
Select Tools & settings, then click Organisation settings.
From the left sidebar, click Security, then Email domains.
Click Add domains.
In the domain field, enter the domain (or wildcard domain) that you’d like to verify.
Choose to apply domain claiming restrictions on joining external workspaces or accepting Slack Connect invitations, then click Next.
You'll need access to a domain name system (DNS) to confirm that the domain belongs to your organisation. Follow instructions provided by your domain hosting service to create a DNS TXT record (for Host, use @ if the domain is not a wildcard and _slack-challenge if it is). It may take up to 72 hours for changes to take effect.
After confirming that your TXT record has been added to your DNS, return to Email domains on your Slack admin dashboard.
Next to a domain, select Verify domain in the status column, then click Next. If you'd like, set your org as the primary organisation for Slack Connect.
Tip: You can also claim domains on Enterprise Grid to prevent people from creating unsanctioned workspaces and make your org’s workspaces easier to find.
Who can use this feature?
Workspace owners and workspace admins (Pro and Business+) Org owners (Enterprise Grid)
