Wipe and clean email
Maybe you still have impression on Wannacry ransomware, which can be spread by email attachments, although Microsoft released patches to fix that in quick response. We still have to make sure our disks are clean of the ransomware leftovers. So how can we wipe and clean email?
First, find the attachment cache and wipe them.
1. Take outlook for example, first we open the Run dialog by using Windows + R and type Regedit, press enter to open it.
2. Navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security (Office 2010),
or HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security (Office 2007);
or HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Security (Office 2013).
3. Double-click on "OutlookSecureTempFolder" and copy the pass in it, where the temp folder locates.
4. Press Windows + E to open file explorer and paste the link to the address bar, and press enter to get into this folder, now all the attachments caches are listed here.
Secondly, wipe and clean what we found
1. Run ByebyeData Eraser and click Erase files and folders.
2. Click Add files button and paste the link to it, Ctrl + A to select them all, or just add the item you would like to erase.
3. Select one erasing method from simple, advanced, complex, or very complex overwrite standard, we do not recommend the very complex way to do this, because it is really not necessary for modern drives, HDD, SSD, or HHD. Try the simple or advanced way instead.
4. Click Erase Now to wipe and clean these outlook attachment cache.
That's how to erase outlook files, and steps above work fine if you can locate the path to the temporary files or folders of other email service client. You can also delete them (use Shift + Delete) and erase free space on the drive which stored them. By doing this, email attachment recovery software will fail to get them back, no matter how hard they try, they still get nothing.