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Email Alerts are not received...

In one of application, Email alerts are sent using SQL sp_send_dbmail stored procedure. Email alerts were working properly, but suddenly noticed email alerts are not received.

To troubleshoot the issue, first I checked the msdb.dbo.sysmail_event_log table using the below query.

SELECT log_id, event_type, log_date, description, process_id, mailitem_id, account_id, last_mod_date, last_mod_user
log_date DESC

If there is any error, you should see records with the event_type value as error.
In my case there are records with event_type value as error, and the description value for those records is same as below

The mail could not be sent to the recipients because of the mail server failure. (Sending Mail using Account 3 (2018-02-01T10:41:27). Exception Message: Cannot send mails to mail server. (The SMTP server requires a secure connection or the client was not authenticated. The server response was: Authentication required).  )

As per the error descript…

Install Windows XP to a Windows Vista installed Laptop

If you are trying to install Windows XP to a Laptop where Windows vista is already installed, you will get a blue screen at the Windows Startup in XP installation process. This is happened due to the SATA hard disk.
To overcome this problem you have to change the BIOS settings. First go to the "Advanced" tab in BIOS Settings and you can find the "SATA Controller Mode" at the bottom.
Change the SATA Controller Mode from "AHCI" to "Compatibility". Then Save the Changes.
After that you can install Windows XP.
Good Luck...