By default, e-mail messages in Outlook can be "postmarked." E-mail postmarking is a feature that helps junk e-mail filtering software to distinguish regular e-mail from junk e-mail. Enable this setting to prevent e-mail postmark creation and processing in Outlook.
Registry Hive | HKEY_CURRENT_USER |
Registry Path | Software\Policies\Microsoft\Office\12.0\Outlook\Options\Mail |
Value Name | DisablePostmarkingOnSend |
Value Type | REG_DWORD |
Enabled Value | 1 |
Disabled Value | 0 |