Switch used with -watchdir where the file found becomes the subject of the email message. The file is still attached.
Other Parameters Required:
Example (cut-and-paste right into your batch file):
NetMailBot -watchfilenameissubject -watchexit -watchdir "C:\Documents and Settings\reports" -to firstname.lastname@example.org -from email@example.com -server mail.domain.com -subject "test"