Can you include Windows environment variables in the Attachment file name?
I tried in the settings XML, and on the command line as below, and neither worked – the email did not get sent.
C:\Backups\SwithMail.exe /a “C:\Backups\Logs\Backup_%date:~10,4%%date:~4,2%%date:~7,2%.log” /s /x “C:\Backups\SwithMailSettings.xml”
I did remove the attachment setting from the XML file before trying the command line version.