Nick Hayer wrote:
Scott -These are file attachments that have come from a Mac email client, probably Outlook Express.
We are getting a lot of spam with this text in the email: x-mac-type="4A504547"; x-mac-creator="4A565752"
Question - can I filter on this or is this a common MAC string?
The mac doesn't use file extensions to determine the type of a file (for example a JPEG), instead it uses a type ID and a creator ID which are part of the files info (including the created date, modified date, etc). The ID's a are 32 bit longs and are normally ASCII coded for readability. In your case all the creator ID's are 4A565752, which is 'JVWR' and if memory serves that is the code for "JPEG Viewer" a shareware image viewer, and the file types are 47494666 ('GIFf') and 4A504547 ('JPEG'), which makes sense as all the file names say .gif and .jpg
Erminio
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