response was: 5.7.0 Authentication Required.

[send4u1]

Type of issue

Typo

Description

System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Authentication Required. For more information, go to at Registration.frmRegistration.SendEmail(String recipient, String subject, String body) in D:\FINALPROJECT\DADC\DADS_orginial_live\Registration\frmRegistration.aspx.cs:line 725 at Registration.frmRegistration.btnEmailOTP_Click(Object sender, EventArgs e) in D:\FINALPROJECT\DADC\DADS_orginial_live\Registration\frmRegistration.aspx.cs:line 677

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Page URL

https://learn.microsoft.com/en-us/dotnet/api/system.net.mail.smtpclient.send?view=net-9.0

Content source URL

https://github.com/dotnet/dotnet-api-docs/blob/main/xml/System.Net.Mail/SmtpClient.xml

Document Version Independent Id

44c00065-d2fe-bda0-2e54-463a2a4806fd

Platform Id

766e6ee4-0ebb-bcf5-cf18-a2dcdfa8eb42

Article author

@karelz

[krwq]

@send4u1 can you please clarify the problem you're experiencing? If you're trying to get help on the error you're seeing I suspect you need to pass in credentials somewhere or enable TLS (SmtpClient.EnableSsl) and set the port correctly. As for the doc issue - this doesn't seem actionable as is.