A Winmail file is a proprietary e-mail attachment format created by Microsoft Outlook. It usually has a .winmail or .att extension and comprises the e-mail message and any attachments in a single compressed file. Winmail information should not suitable with different e-mail purchasers and may seem as unreadable textual content or an attachment with an unknown format.
Winmail information had been launched within the early days of e-mail to beat limitations in the way in which e-mail messages had been dealt with. On the time, e-mail methods weren’t standardized, and totally different purchasers used totally different strategies to format and encode messages. Winmail information supplied a approach to make sure that messages despatched from Outlook can be suitable with different e-mail purchasers, even when these purchasers didn’t assist the identical formatting choices.