You can communicate with candidates via email within the app.
Compose an email
From the candidate profile, click on Email icon to write an email to candidate. Signature will be added by default. You can change this signature in My profile setting.
Email templates are managed by Admin. If you choose to schedule an email to be sent later, you can do so. It will be sent based on your timezone. You can check its status in the Email tab

View all communications
You can view all emails communicated with the candidate from the Email tab, including the scheduled ones. Only hiring team members will be able to see this tab