Answer

PROBLEM

ENVIRONMENT

• GFI MailEssentials
• all supported environments 

SOLUTION

1. Backup the following file:

• GFI MailEssentials 2010: C:\Program Files (x86)\GFI\MailEssentials\data\product.config.
• GFI MailEssentials 2012: C:\Program Files (x86)\GFI\MailEssentials\Antispam\data\product.config
• GFI MailEssentials 2014:
  • C:\Program Files (x86)\GFI\MailEssentials\Backend\data\product.config
  • C:\Program Files (x86)\GFI\MailEssentials\Antispam\data\product.config
  • C:\Program Files (x86)\GFI\MailEssentials\ActionServices\data\product.config

1. Open product.config in Notepad
2. Search for the line which contains DigestUserLookup. By default it should list: <add key="DigestUserLookup" value="2"/>
3. The following list shows the possible values. Set it accordingly:
   • 0 = Check for duplicates only (no AD checking and no aggregate, this is the value which will send to public folders and distribution lists as well)
   • 1 = Check AD users
   • 2 = Check AD users and aggregate user emails (this is the default value)
4. Restart the GFI MailEssentials services

CAUSE