SQL Email configuration on SQL Server Express - sql-server

Question

I am trying configure SQL database mail send email Gmail to Gmail but I got:
Message
The mail could not be sent to the recipients because of the mail server failure. (Sending Mail using Account 1 (2021-04-14T09:21:14). Exception Message: Cannot send mails to mail server. (Failure sending mail.).
)
I do not know what I am doing wrong.
---- create the database account ----
Use MSDB
go
IF NOT EXISTS(SELECT * FROM msdb.dbo.sysmail_account WHERE name = 'SQLServer Express')
BEGIN
--CREATE Account [SQLServer Express]
EXECUTE msdb.dbo.sysmail_add_account_sp
#account_name = 'SQLServer Express',
#email_address = 'sangitar23#gmail.com',
#display_name = 'Audit Partnership',
#replyto_address = '',
#description = '',
#mailserver_name = 'smtp.gmail.com',
#mailserver_type = 'SMTP',
#port = '587',
#username ='sangitar23#gmail.com',
#password = 'Atlanta2020!',
#use_default_credentials = 0 ,
#enable_ssl = 1 ;
END --IF EXISTS account
------ create the database mail profile --------
Use MSDB
go
IF NOT EXISTS(SELECT * FROM msdb.dbo.sysmail_profile WHERE name = 'SQLServer Express Edition')
BEGIN
--CREATE Profile [SQLServer Express Edition]
EXECUTE msdb.dbo.sysmail_add_profile_sp
#profile_name = 'SQLServer Express Edition',
#description = 'This db mail account is used by SQL Server Express edition.';
END --IF EXISTS profile
------------ To assign a database mail account to the database mail profile--------
Use MSDB
go
IF NOT EXISTS(SELECT *
FROM msdb.dbo.sysmail_profileaccount pa
INNER JOIN msdb.dbo.sysmail_profile p ON pa.profile_id = p.profile_id
INNER JOIN msdb.dbo.sysmail_account a ON pa.account_id = a.account_id
WHERE p.name = 'SQLServer Express Edition'
AND a.name = 'SQLServer Express')
BEGIN
-- Associate Account [SQLServer Express] to Profile [SQLServer Express Edition]
EXECUTE msdb.dbo.sysmail_add_profileaccount_sp
#profile_name = 'SQLServer Express Edition',
#account_name = 'SQLServer Express',
#sequence_number = 1 ;
END
EXEC msdb.dbo.sp_send_dbmail
#profile_name = 'SQLServer Express Edition',
#recipients = 'sangitarai023#gmail.com',
#body = 'Email notification for Audit Partnership SFTP',
#subject = ' This email has been sent from SQL Server to notify, client uploaded data on the SFTP cite' ;