When I call the SP "msdb.dbo.sp_send_dbmail" the email is queued and an entry is created in msdb.dbo.sysmail_allitems with status "Unsent", also "ExternalMailQueue" is filled with the entry but the Email is not sent, The problem is that \MSSQL\Binn\DatabaseMail90.exe" is not triggered, and I have to double click on this external program to fire all the emails in the Queue, Is there any way to fix this issue?..
Thanks All for your responses.