5/13/2024 12:00:48 AM=>Exception(SenMail) :System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 Client not authenticated to send mail. Error: 535 5.7.139 Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant. Visit https://aka.ms/smtp_auth_disabled for more information. [MN2PR16CA0012.namprd16.prod.outlook.com 2024-05-13T00:00:50.129Z 08DC719613C65477]
   at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)
   at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, MailAddress from, Boolean allowUnicode)
   at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at SAPLMailer.SAPLMailerService.SenMail(PendingMail objPendingMail) in D:\DevOpsProjects\SAPLMailer\SAPLMailer\SAPLMailerService.cs:line 524
5/13/2024 12:00:48 AM=>(SenMail)Failure sending To mail ID :envusupport@sapl.net
5/13/2024 12:00:48 AM=>(SenMail)Failure sending CC mail ID :
5/13/2024 12:00:48 AM=>(SenMail)Failure sending mail Body :Hello, Please check attached file having issues in sending mails, please do the needful. 
5/13/2024 5:30:40 AM=>Exception(SenMail) :System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 Client not authenticated to send mail. Error: 535 5.7.139 Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant. Visit https://aka.ms/smtp_auth_disabled for more information. [BL0PR0102CA0044.prod.exchangelabs.com 2024-05-13T05:30:42.470Z 08DC7194F5EE2B1E]
   at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)
   at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, MailAddress from, Boolean allowUnicode)
   at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at SAPLMailer.SAPLMailerService.SenMail(PendingMail objPendingMail) in D:\DevOpsProjects\SAPLMailer\SAPLMailer\SAPLMailerService.cs:line 524
5/13/2024 5:30:40 AM=>(SenMail)Failure sending To mail ID :envusupport@sapl.net,
5/13/2024 5:30:40 AM=>(SenMail)Failure sending CC mail ID :
5/13/2024 5:30:40 AM=>(SenMail)Failure sending mail Body :Favourite Report
5/13/2024 5:32:04 AM=>Exception(SenMail) :System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 Client not authenticated to send mail. Error: 535 5.7.139 Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant. Visit https://aka.ms/smtp_auth_disabled for more information. [MN2PR13CA0022.namprd13.prod.outlook.com 2024-05-13T05:32:06.428Z 08DC72889AAE0084]
   at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)
   at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, MailAddress from, Boolean allowUnicode)
   at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at SAPLMailer.SAPLMailerService.SenMail(PendingMail objPendingMail) in D:\DevOpsProjects\SAPLMailer\SAPLMailer\SAPLMailerService.cs:line 524
5/13/2024 5:32:04 AM=>(SenMail)Failure sending To mail ID :envusupport@sapl.net,
5/13/2024 5:32:04 AM=>(SenMail)Failure sending CC mail ID :
5/13/2024 5:32:04 AM=>(SenMail)Failure sending mail Body :Favourite Report
5/13/2024 5:32:16 AM=>Exception(SenMail) :System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 Client not authenticated to send mail. Error: 535 5.7.139 Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant. Visit https://aka.ms/smtp_auth_disabled for more information. [MN2PR13CA0006.namprd13.prod.outlook.com 2024-05-13T05:32:18.061Z 08DC7298072CACC6]
   at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)
   at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, MailAddress from, Boolean allowUnicode)
   at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception)
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at SAPLMailer.SAPLMailerService.SenMail(PendingMail objPendingMail) in D:\DevOpsProjects\SAPLMailer\SAPLMailer\SAPLMailerService.cs:line 524
5/13/2024 5:32:16 AM=>(SenMail)Failure sending To mail ID :rangolik@sapl.net,
5/13/2024 5:32:16 AM=>(SenMail)Failure sending CC mail ID :
5/13/2024 5:32:16 AM=>(SenMail)Failure sending mail Body :Favourite Report