Mozilla Thunderbird is email service, open source, cross e-mail platform which has been developed by Mozilla to help individuals having control and create a good future for the web. Yet issues like opening and downloading new messages, problems in opening file attachments as well as sending and receiving of messages is quite common. Mozilla Thunderbird users need to back up regularly to guard against the possibility that their profile gets corrupted or wiped after installing a new extension or a new version of Firefox.