How to reply to or forward messages in RoundCube This tutorial assumes that you've already logged in to RoundCube webmail. Now let's learn how to reply to or forward messages that we've received. Select the message you want to reply to. To send your reply to the sender of the email, click the Reply icon. To send your reply to the sender of the email AND any other people who were sent the message, click the Reply all icon. Now click the Forward icon dropdown button. The Forward inline option is the default mode, and makes the message available for editing and forwarding. The Forward as attachment option will copy the selected message as an attachment and doesn't allow you to edit anything. Whether you're replying to the sender, replying to all, or forwarding a message, you can always include additional email addresses in the To field. When ready, click the Send icon. This is the end of the tutorial. You now know how to reply to or forward email messages with RoundCube.