This article applies to:
- Trustwave MailMarshal (SEG)
- Trustwave ECM/MailMarshal Exchange 7.X
Symptoms:
- PGP messages are received as an attachment.
- If sending or receiving PGP messages, they are received as an attachment to a blank message with a message stamp.
Causes:
MailMarshal can detect PGP encrypted messages. Because these messages are encrypted, MailMarshal cannot unpack them to examine their contents. If a rule is not specified to block PGP messages, they will be passed through MailMarshal unchecked.
When MailMarshal applies a message stamp to a PGP message, it cannot actually stamp the PGP part of the message. Instead, it creates a new message, stamps it, and attaches the original PGP message to the new message.
Reply:
Exclude PGP messages from being message stamped. Alternatively, for a solution where there is no requirement to detect PGP messages, contact Trustwave Technical Support.
- This article was previously published as:
- NETIQKB29234
- Marshal KB148