This page consists of screenshots from the Email Configuration Screen in Mail Booster WordPress Plugin.
This gives an idea about how to configure Basic Info and Account Setup in Email Configuration.
Using Email Configuration, you override the Name and Email for sending emails. You can also choose mailer type so that your emails can be sent via SMTP mailer or PHP mail() Function.
If you choose SMTP as mailer type, then you would need to configure settings for SMTP Host, Encryption, SMTP Port and Authentication. You can also send test email to verify the settings.