This article applies to:
- Trustwave MailMarshal (SEG)
- Trustwave ECM/MailMarshal Exchange 7.X
Symptoms:
Event ID: 3512
Type: Error
Source: MMEngine (MailMarshal SMTP) or MEXEngine (MailMarshal Exchange)
Description: Message unpacking error
Causes:
When MailMarshal receives a message, it breaks the message up into its individual components for analysis.
The event is raised whenever MailMarshal is unable to properly unpack a message into its constituent components.
More Info:
As a security measure, if any component of the message cannot be properly extracted or analyzed, MailMarshal stops processing of the message and moves it to a "dead letter" folder. This action is taken to prevent potentially harmful content from being delivered.
For more information, see Q10868: What is a Deadletter?