On webmail, you can compose or reply an email using a group mail, or your colleague's email address. To do so, you need to first set up these email addresses as your alternate identities.

1. On your webmail, click into General. 2. On “Alternate Identity”, enter the full name, email address and reply-to address on the given rows. 3. Click [Update] to save the records.

Now that you have created multiple identities, when composing or replying an email, you can click on the “From” dropdown box to select which address you want to use for the compose/reply.