MailTransportSendAsync Method (FormatOptions, MimeMessage, CancellationToken, ITransferProgress)
public abstract Task<string> SendAsync( FormatOptions options, MimeMessage message, CancellationToken cancellationToken = default, ITransferProgress progress = null )
options is null.
message is null.
|ObjectDisposedException||The MailTransport has been disposed.|
|ServiceNotConnectedException||The MailTransport is not connected.|
|ServiceNotAuthenticatedException||Authentication is required before sending a message.|
A sender has not been specified.
No recipients have been specified.
|OperationCanceledException||The operation has been canceled.|
Internationalized formatting was requested but is not supported by the transport.
|IOException||An I/O error occurred.|
|CommandException||The send command failed.|
|ProtocolException||A protocol exception occurred.|
Asynchronously sends the specified message.
The sender address is determined by checking the following message headers (in order of precedence): Resent-Sender, Resent-From, Sender, and From.
If either the Resent-Sender or Resent-From addresses are present, the recipients are collected from the Resent-To, Resent-Cc, and Resent-Bcc headers, otherwise the To, Cc, and Bcc headers are used.