I am seeing the following in the log with the Sniffer header not being added to the email.
<s u='20161214224234' m='c:\SmarterMail\Spool\proc\work\1743661413.eml' s='0' r='0'> <p s='0' t='140' l='83954' d='167'/> <g o='0' i='172.99.85.254' t='u' c='0' p='0' r='New'/> </s> <e u='20161214224234' context='scanMessageFile().xhdr.inject' m='c:\SmarterMail\Spool\proc\work\1743661413.eml' code='69' text='ERROR_MSG_XHDRi: Drop Msg XHDR injector can't remove original!'/> John T eServices For You ############################################################# This message is sent to you because you are subscribed to the mailing list <sniffer@sortmonster.com>. This list is for discussing Message Sniffer, Anti-spam, Anti-Malware, and related email topics. For More information see http://www.armresearch.com To unsubscribe, E-mail to: <sniffer-...@sortmonster.com> To switch to the DIGEST mode, E-mail to <sniffer-dig...@sortmonster.com> To switch to the INDEX mode, E-mail to <sniffer-in...@sortmonster.com> Send administrative queries to <sniffer-requ...@sortmonster.com>