Change the limit for the number of MIME headers
- Policy ID
- L_ChangethelimitMIMEheaders
- Scope
- User Configuration
- Supported on
- At least Windows Server 2008 R2 or Windows 7
- Source
- Microsoft 365 Apps / Office Administrative Templates (version 5568.1000)
- Category
- Microsoft Outlook 2016 › MIME to MAPI Conversion
Description
By default, the limit is 20000 for the number of MIME headers when an e-mail message is converted from MIME to MAPI. The number can be set to any positive integer. This helps prevent scenarios in which Outlook hangs while attempting conversion.
Options
Registry
UserHKEY_CURRENT_USER
- mimeheadersREG_DWORD