Mozilla Thunderbird is free, cross stage, email customer application stacked with highlights and offers a simple to utilize UI. It is a branch to the prior Mozilla Firefox Web program however Thunderbird has now been isolated as the organization needed to center around Firefox. Mozilla Thunderbird has been very famous and contends with any semblance of Microsoft Outlook and Eudora Mail. Mozilla Thunderbird underpins additional items, augmentations that improve the functionalities of the email customer. It offers highlights like – One Click Address Book which enables another contact to be included with a tick the star symbol and include their profile points of interest with two ticks. It has extra highlights that permits talking with various contacts, customized email address book, envelopes, additional items. Mozilla Thunderbird offers upgraded security and phishing insurance. It comes inbuilt with against spam arrangements and cuts off garbage sends. It offers mechanized updates as and when another form is discharged.