The values for these settings can be modified in applicationcontainer\conf\email.properties
Following items are available for modification,
email.id=<email id of the inbox that will receive approval emails>
email.pwd=<encrypted password>
email.folder=<inbox>
email.uri=<server name>:<port number>
email.samURL=http://<server name>:<port number>
email.samUserName=<email id of the SAM user which is needed for approval actions via API calls>
email.samPassword= <encrypted password>
To update the passwords, use the following URL to get encrypted password,
http://<server name>:<port number>/emailapprover/encrypt/<new password>