SOST email notification not coming SBWP

Hi,

We are not getting email notifications for failed SOST messages in SBWP transaction. This is happening for emails sent through payment run Tcode F110.

When we directly send emails using SBWP tcode to incorrect email we do get notification. But for Payment run F110 emails we are not getting this notification.

SAP_BASIS is on 702 SP 10.

SAP Kernel: 720_REL

Regards,

Raj