When you create email accounts from hosting providers they often make you access your email accounts through software like Hoard and Mail Squirel. This means having to go to mydomain.com/webmail and sign in before accessing the software to reas or send emails.
If you have Microsoft Outlook, you can manage email accounts from your desktop.
Outlook 2010 configures some email accounts automatically, but if you are with JustHost the process has to be done manually.
I’ve created a video showing how to do this.