This guide will assist you in changing your email account password via the Webmail interface. Before proceeding, ensure you know your current password and can access domain.com/webmail.
In this case, domain.com represents your website/domain name.
For instance: If your domain is yourdomain.com, you should access your webmail as domain.com/webmail.
Access Webmail
Navigate to your webmail by entering http://domain.com/webmail into your web browser, such as Chrome, Firefox, Internet Explorer, Edge, Opera, etc.
A Horde webmail interface will open for you. Then, log in to your webmail by entering your username & password.
Your username should be your full email address: email@domain.com.
The password should be your current email password.
Click Login.
Go to Preferences
Click on the "Gear Icon" located at the top > Preferences > Select Password.
Click on "Password" as shown in the picture below.
Change Password
Enter your current password and the new password in the fields provided below.
Once you are done, click "Change Password".
Your email account has now been updated to the new password.
NOTE: Remember to update your email account password in Outlook, Thunderbird, etc.