You reply to an E-Mail message by selecting the desired E-Mail and then clicking on the Reply option under Mail in the panel. If the CC field holds other recipients and you also want to reply to them, select Reply all. In the E-Mail settings you can choose whether recipients should be entered in the "To" or "CC" field, please also refer to When "Reply all":. In both cases, the E-Mail is opened in an editing window. Compose your reply and then click on the icon under Send. Other options, as adding attachments or formatting text, can be found in the section the section called “Composing new E-Mails”.

As an alternative you can also activate the functions Reply and Reply all via the context menu.