In order to change your password, you first must login to your email account using the Squirrelmail interface. Be sure to select secure1.tigerwave.com as your email server. Use the account name assigned to you by Tigerwave. Note, this account name will be your complete email address including the part following the @ sign.
The first time you login into Squirrelmail, you will be asked to enter your full name and your desired "Reply-To" address to be associated with all email that you send. Note that the Reply-To address will not change anything about your Tigerwave email account except for what address shows up in the "To:" line when someone clicks Reply to an email message you have sent.
After logging into Squirrelmail, your email password may be changed.