<identifier/>
This element controls the generation of a message identifier X-header.
The content of the X-header will be the message identifier (usually the file name) of the message that was scanned.
<identifier on-off='off'>X-MessageSniffer-Identifier</identifier>
on-off='on' turns on the identifier X-Header, on-off='off' turns it off.
X-MessageSniffer-Identifier is the default name of the X-header. You can change this text to customize the name of the header.
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