The process of replying to messages will vary depending on your webmail client of choice:

Roundcube

If you want to respond to a message, follow these steps:

  1. Open the Mail task from the main menu.
  2. Select the folder containing the specific message from the folder list.
  3. Select the specific message from the message list.
  4. Click on the Reply button from the top toolbar.

This will open the Compose screen with the subject of the original message with a Re: prefix, the body of the original message quoted in your message, and the sender of the original message added as a recipient in the To: field of your message.

If you click on the Reply-All button, on top of the Reply button behavior, any additional recipients of the original message from the To and Cc headers will be added to the To: and Cc: fields of your message.

You can learn more about how to reply to a message in the Sending Email Messages article from Roundcube's official documentation.

Webmail Classic

To compose a reply to a message via Webmail Classic, you should:

  1. Select the Inbox tab from the main menu.
  2. Click on the folder containing the specific message from the Folder Status section (folder list).
  3. Read the message by clicking on the sender's name/e-mail address or on the subject of the message.
  4. Click on the Reply button.

This will open the Compose page with the original message quoted in the Message field and the sender of the original message filled in the To: field.

If you wish to compose a reply to all the email addresses from the From, To, and Cc headers of the original message, use the Reply All button on step #4.