¿Necesitas llamar a sendasync en smtpclient?

Do you need to call sendasync in smtpclient?

An asynchronous call is already in progress. It must be completed or canceled before you can call this method. You can still call SendAsync () inside the loop, you need multiple SmtpClient instances to send multiple mails at the same time.

After calling SendAsync, you must wait for the email transmission to complete before attempting to send another email message using Send or SendAsync.

When sending email using SendAsync to multiple recipients, if the SMTP server accepts some recipients as valid and rejects others, a SmtpException is thrown with a NullReferenceException for the inner exception. If this occurs, SendAsync fails to send email to any of the recipients.

SendMailAsync () is a wrapper around SendAsync () method anyway. async/await is way neater and more elegant. It would achieve exactly the same requirements. – Boris Lipschitz May 14 ’14 at 4:27 Is it better to use using – or dispose – or no practical difference?

Dim userState As String = “test message1” client.SendAsync (message, userState) Console.WriteLine (“Sending message… press c to cancel mail. Press any other key to exit.”) Dim answer As String = Console.ReadLine () ‘ If the user canceled the send, and mail hasn’t been sent yet, ‘ then cancel the pending operation.

If this occurs, SendAsync fails to send email to any of the recipients. Your application can detect a server certificate validation error by examining the Error property passed into the SendCompletedEventHandler delegate. The Timeout property does not have any effect on a SendAsync call.

The SendCompleted event is raised each time an email message is sent asynchronously when the send operation completes. To send an email message asynchronously, use the SendAsync methods. SendCompletedEventHandler is the delegate for SendCompleted. The AsyncCompletedEventArgs class provides the event handler with event data.