Sending mail through FM : SO_NEW_DOCUMENT_SEND_API1

Dear Friends,

I am using the Function Module : SO_NEW_DOCUMENT_SEND_API1 to send mails to MS Outlook. My program is working perfectly fine, when I execute in the foreground. However, when I schedule a job for the same program, it is throwing up an exception. Not sure if it something to do with the user authorization? In fact, user has full authorization. Could someone help on this?

Regards,

Chandru