public override async Task <SmtpResponse> SaveAsync(ISessionContext context, IMessageTransaction transaction, CancellationToken cancellationToken)
{
var textMessage = (ITextMessage)transaction.Message;
var message = MimeKit.MimeMessage.Load(textMessage.Content);
queueService.Push(QueuedEmailMessage.FromMimeMessage(message));
return(SmtpResponse.Ok);
}