Hi Vivek,
you can always various options are there, You can create a DL for those 4 to 5 ppl. and assign them to the BP as group to notify at once slot.
or Incident Management and Change Request Management: E-Mail functionality in SAP Solution Manager 7.1 step 5 sending email to multiple recipients.
or 1512895 Support team determination + e-mail notific. to support team
or refer Sending E-Mail from Support Message
Thanks
Jansi