This article applies to:
- Trustwave MailMarshal (SEG)
- Trustwave ECM/MailMarshal Exchange
Question:
Can SEG or ECM recognize file types if the file extension has been changed?
Reply:
Yes. File type rules identify files by their characteristic signatures. Changing file extensions does not affect the identification. For instance a ZIP file (.zip) with its file extension changed to .zoop will still be recognized and unpacked correctly.
Notes:
Specific information on the file types recognized can be found in the following Trustwave Knowledgebase article:
SEG/MailMarshal SMTP 6.0 and above, ECM/MailMarshal Exchange 5.2 and above:
- Q10858: What file types are recognized by Trustwave SEG and ECM?
Articles about previous (unsupported) versions have been withdrawn.
- This article was previously published as:
- NETIQKB33514