Mail not being sent for background job spool

Hello All,

I have created a back ground job by adding a mail id in the spool receipient list. The job has finished successfully and spool is created but the mail has not been sent I have checked SOST transaction and no mail has been sent to this mail id.

This is only happening for some jobs other jobs are able to successfully send the spool as mails to the mail id's mentioned in spool receipient list.

I would like to know why this is happening only for some jobs and how can I check the whether mail has been generated or not.

Your replies will be greatly appreciated.

Thankyou,

Ranjan