มหาวิทยาลัยเทคโนโลยีราชมงคลกรุงเทพ

ตัวอย่างหนังสือ

The following From address failed: opsvlcloud@gmail.com : MAIL FROM command failed,5.7.57 Client not authenticated to send mail. [SI2P153CA0010.APCP153.PROD.OUTLOOK.COM 2025-06-23T16:04:11.661Z 08DDB2040BC79A08],530,SMTP server error: MAIL FROM command failed Detail: 5.7.57 Client not authenticated to send mail. [SI2P153CA0010.APCP153.PROD.OUTLOOK.COM 2025-06-23T16:04:11.661Z 08DDB2040BC79A08] SMTP code: 530
2025-06-23 16:04:13 CLIENT -> SERVER: QUIT
2025-06-23 16:04:13 SERVER -> CLIENT:
2025-06-23 16:04:13 SMTP ERROR: QUIT command failed: