This data file is associated with a mail account. To remove it use the ‘Email’ tab. An OST file is an offline folder file in Microsoft Outlook.

For this, you need to locate the Outlook data file and then delete it after taking the backup. The detailed steps are as follow, Open Outlook and right-click on your email profile. Choose ‘Open File ...

Free add-ons for Outlook and Thunderbird let you save all or selected e-mail attachments to a folder on your PC, and Yahoo Mail lets you download attachments in bulk—something you can't do ...

Lots of email will slow down Microsoft Outlook’s performance. Part of a regular maintenance routine should include deleting large emails that you no longer need.