SmtpClient.Send Method (MailMessage)
Sends the specified message to an SMTP server for delivery.
Assembly: System (in System.dll)
message is a null reference (Nothing in Visual Basic).
MailMessage.From is a null reference (Nothing in Visual Basic).
This object has been disposed.
The connection to the SMTP server failed.
The operation timed out.
EnableSsl is set to true, but the SMTP mail server did not advertise STARTTLS in the response to the EHLO command.
This method blocks while the e-mail is transmitted. You can specify a time-out value using the Timeout property to ensure that the method returns after a specified amount of time elapses.
Before calling this method, the Host and Port properties must be set either through the configuration files by setting the relevant properties, or by passing this information into the SmtpClient(String, Int32) constructor.
You cannot call this method if there is a message being sent asynchronously.
If you receive an SmtpException exception, check the StatusCode property to find the reason the operation failed. The SmtpException can also contain an inner exception that indicates the reason the operation failed.
When sending e-mail using Send to multiple recipients and the SMTP server accepts some recipients as valid and rejects others, Send sends e-mail to the accepted recipients and then a SmtpFailedRecipientsException is thrown. The exception will contain a listing of the recipients that were rejected.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.