Final answer:
The solution mentioned in the question is false. To configure SQL Server to allow a user to send mail using Database Mail, the DatabaseMailUserRole should be assigned to the user in the msdb database.
Step-by-step explanation:
The solution mentioned in the question is false.
To configure SQL Server to allow a user to send mail using Database Mail, the DatabaseMailUserRole should be assigned to the user in the msdb database, not the master database. The DatabaseMailUserRole is a built-in database role in SQL Server that grants the necessary permissions to use Database Mail. By assigning this role to the user in the msdb database, the user will have the required permissions to send mail using Database Mail.