<p>To start this assistant again in the future from the main window of <i>Thunderbird</i>, choose <b>[[!img lib/open-menu.png alt="Menu" class=symbolic link=no]] ▸ Account Settings</b> and then, from the <b>Account Settings</b> dialog, choose <b>Account Actions</b> ▸ <b>Add Mail Account…</b>.</p>