You can use ActiveSync with your Treo 650 Smartphone to synchronize
your myhosting.com Hosted Exchange account. You can follow these steps
to set up ActiveSync from your Treo.
From your Treo 650, select Start > Programs > palmOne > VersaMail Setup
Select your username from the drop-down list at the top of the
screen, and then select the option to create a new VersaMail email
account. Click Next.
Select the option to synchronize with a mail service from this list, and then select Exchange ActiveSync. Click Next.
Enter the basic account information:
Enter a descriptive name for the account
Enter account username
Enter your password
Enter your email address
Then click Next.
Enter the following information:
Enter the Exchange Server Name ex.myhosting.com
Enter Port 443.
Select This server requires a secure connection (SSL)
Then click Finish.
For more information about ActiveSync with the Treo 650, you can refer to the palmOne Knowledge Base.