Using the Outlook 2010 mail client, a scheduled email is configured to send at a particular time, but it never is actually sent.  
Without the Symantec Endpoint Protection (SEP) 12.1 client Outlook plug-in, the mail is sent without any difficulty. 

This issue has been fixed in Symantec Endpoint Protection 12 Release Update 1 (RU1) Maintenance Patch 1 (MP1). 
For information on how to obtain the latest build of Symantec Endpoint Protection, read
TECH 103088: Obtaining an upgrade or update for Symantec Endpoint Protection or Symantec Network Access Control


 

Applies To

OS: Microsoft Windows 7 Service Pack 1 (build 7601)
OS Type: 64-bit

Plug in installed:
-  Microsoft Exchange.
-  Microsoft Outlook social connector.
-  Microsoft Sharepoint Server colleague Import.
-  OneNotes Notes.
-  Symantec Endpoint Protection Small Business Edition v12.1.671.4971

Inactive Application Add-ins
-Microsoft VBA for outlook Addin

Disabled Application Add-ins
- Windows Search Email Indexer.