When communicating to customers, contact details are displayed for each employee. This employee can manage himself which e-mail address is shown.
If you prefer not to use your agent e-mail address in customer communication, but rather your general office address, you can change this in your profile:
Go to Personal> Profile settings
Go to Contact Information
Change your e-mail address
Save your data
Note: the email address used when logging in is still the same! Only the e-mail address - which is entered in your profile - is shown when communicating to customers.
For more information about your profile, see Set up your public profile.