How to access your Spiffy Stores mailboxes through webmail
From Spiffy Stores Knowledge Base
Your webmail is accessible using most modern web browsers.
To access your webmail, you just need to go to the following address;
http://webmail.yourstore.spiffystores.com
Please note that yourstore is the name that has been assigned to your Spiffy Stores site. You can only access your webmail through this address. It is not accessible through any other domain names that you have assigned to the site.
...and log in using the full email address and it's password.