Setting up an email footer is a good way to slowly help get the word out about particular things, in this case your store traffic site and/or online store.

If you want to create email addresses with your domain name, you can do so if you have your own domain and host, provided that your host allows such for your account.

If you want to use a mail client to send and receive mail for a new email address you created, you can typically do so fairly easily.

If you want to check your email online without using an email program, you can do so by logging into your cpanel account and using the included webmail program.