Send an email
You can send emails to the users of your choice. You can do it from different section in UserEngage.
Select who you want to contact via email. You can do it manually or apply Filters. For example, show me everybody whose trial is to expire within 3 days. Then, if you hit the button “Send a message” located on top of the table (just below the list of segments), choose “Email messages”
When you enter the profile, you will be able to send an email to a particular user from the central window when you hit “Send an email”