Where can I go to use a browser to check my email?

You can use any browser to check your email online from any computer with internet access.

If you're on a Plusmail server, you can simply point your favorite web browser to:
http://your-domain.com/webmail

If you've created a POP account (email box) named "info@your-domain.com then your login to check that account will be "info" (no "" marks).