Amend TSQL to your environment, run the TSQL, restart the agent service and test (I find it easy to enter an incorrect username and password). USE [msdb] GO EXEC msdb.dbo.sp_set_sqlagent_properties @email_save_in_sent_folder=1,                              @databasemail_profile=N'<TSQL_MAIL_PROFILE>’,                              @use_databasemail=1 GO USE [msdb] GO EXEC msdb.dbo.sp_add_alert @name=N’Login Mismatch’,                               @message_id=18456,                               @severity=0,                               @enabled=1,                               @delay_between_responses=0,                               @include_event_description_in=1,                              @job_id=N’00000000-0000-0000-0000-000000000000’GO USE [msdb]…

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