I am trying to Send Email using the System.Net.Mail.MailMessage and System.Net.Mail.SMTPClient class. It gives me the following error:
Syntax error, command unrecognized. The server response was: firstname.lastname@example.org recipients flow control, try later at System.Net.Mail.RecipientCommand.CheckResponse(SmtpStatusCode statusCode, String response) at System.Net.Mail.SmtpTransport.SendMail(MailAddress
sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception)
What can be the possible causes for this error.
Resolved the issue.
I was trying to send email to around 2280 recipients. All these recipients were added to the BCC field. After a little bit of trial and error i found that it only allows max 1000 recipients in the BCC field.
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