This policy setting allows you to manage whether Internet Explorer uses 8-bit Unicode Transformation Format (UTF-8) for mailto links.
If you enable this policy setting, Internet Explorer encodes mailto links in UTF-8.
If you disable or do not configure this policy setting, Internet Explorer sends mailto links encoded through the user's code page. This behavior matches the behavior of Internet Explorer 6 and earlier. The user can change this behavior on the Internet Explorer Tools menu: Click Internet Options, click the Advanced tab, and then under International, select the "Use UTF-8 for mailto links" check box.
| Registry Hive | HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER |
| Registry Path | Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Protocols\Mailto |
| Value Name | UTF8Encoding |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |