Hi i am trying to configure send email smart service, i did all the changes into

Take a look at this section of the documentation forum.appian.com/.../Configuring_Notifications

Pay especial attention to the double stop-suite requirement

there are many properties, i am not getting in which property i need to make changes..can you just point out the specific properties which i need to change to achive the particular scenario...

Reading the documentation and getting familiar with it will save you a lot of time in the future, although it may seem time consuming to read a page of it, it will definitely help you to improve your knowledge about Appian, I definitely recommend going through this link to learn more about how notification settings work. Each of the settings is explained in detail in the table.

While you finish reading this section of the documentation let me summarize it here:

1. E-mail alerts can be disabled per user (each user can change his/her alert settings). In this case the e-mail alerts you want to disable is the "An error in the process has occurred" as explained here: forum.appian.com/.../Notifications

2. You can disable them for all users adding the following property in custom.properties and restarting the engines twice as explained here forum.appian.com/.../Configuring_Notifications

server.conf.notifications.process_exception_msg_timing=never
server.conf.notifications.task_exception_msg_timing=never

Thank you @eduardo..i need one more clarification, is above setting will stop the system alert and email alert both ? my concern is only about the email alert....

According to the doc page Eduardo referenced, "The default values for system notifications sent using email can be configured in custom.properties..."

Based on that, I would assume the property settings he listed will only affect the email alerts. The system alert setting will not change.

Keep in mind, however, that changing this setting only affects users that have NOT set a different preference for receiving email alerts for Process Exception and Task Exception. If the user has set a preference, then the user's preference is maintained.

That's correct Mohan, as Meghan describes this only stops e-mails alerts. The send e-mail node will continue to work.