How do we add email accounts?

Don;t understand what is needed to add an email address?  I attached a screen shot.

My understanding is that you are planning to add an SMTP as a Sender Email of your email alerts.

In order to complete this, you need the SMTP Details like hostname, port, username, password. You can find this information from your email host provider. Here's an example from verizon.

Related guide: How-to-Setup-SMTP-for-a-Form

Hope that helps. If you have any questions, let us know. Thank you.