When crafting your automated sequence, it's possible to add a "Find emails" step that will allow sending emails. It might be useful in case you don't have email addresses but still want to combine the outreach channels. Closely can search the emails for you. Here's how it works:
In the second step choose the LinkedIn search as a source and paste your URL, proceed to the next step after that. Before you can use the Send email action, you should add the Find Emails step
After that, you'll be able to add the Send email action. At the right, you can select the types of emails that Closely will use and set the tracking options
Important notice: for contacts with no emails found, the Send email step will be skipped