Easily test sending and receiving email locally using MailHog

A java application which I work on has a feature to send emails via the corporate SMTP server to notify certain personnel whenever an error occurs. For security reasons, only servers within a certain networks can access the SMTP server and send emails. For instance, the computer which I use to build the application does not have access to the SMTP server. When searching for an email testing tool, I stumbled upon MailHog. Within minutes, I was able to run MailHog and test sending emails without having to deploy the app to the remote servers.