SAPB1 email (SBO mailer) needs restarting

Hi All,

Time and time again we have to manually restart SBO mailer (or email service under license manager). this is because email stop working without any apparent issue.  This has been an ongoing issue with many installations. I wonder if there is a permanent solution to this issue? Obviously customers are unhappy that someone has to manually restart SBO mailer to clear the outbox. We have tried all settings (setting intervals to 5 min etc).

Thanks in advance