After selecting the email you wish to reply to in the email list, click on "Reply" in the toolbar above the reading pane to reply to the sender of that email.
After selecting the email you wish to reply to in the email list, click on "Reply All" in the toolbar above the reading pane to reply to the email to all relevant recipients.
How to forward?
In the email list, click on or check the emails you want to forward (supports multiple emails), then click on "Forward/Forward All" in the toolbar. Please attach multiple emails to one email for forwarding in a batch.
On the email editing page, enter the email address of the recipient you want to forward to, and then click "Send" to proceed.