1.    Login into your WordPress admin portal via domain.com/wp-admin



2.    Navigate to Add New under Plugins 



3.    Look for SMTP plugins such as SMTP mailer (https://wordpress.org/plugins/smtp-mailer/) or 


       WP Mail SMTP (https://wordpress.org/plugins/wp-mail-smtp/)




4.    Once it has been install, may navigate to the plugin settings from Setting (In my case, 


        I will be using SMTP mailer)



5. You would need to ensure that the SMTP username is a legit/valid email on your hosting. 



6. Basic settings will be as below: