public void sendMessages(int count) { var bulk = client .GetMessages(cfg => cfg .ForMessage <SendMailMessageCommand>(msg => msg .FromQueues("sendmailmessagecommand_scheduler_receiver") .WithBatchSize(count)) ); var msgs = bulk.GetMessages <SendMailMessageCommand>(); _logger.Debug("Got messages: " + msgs.Count()); msgs.ToList().ForEach(async msg => { try { var x = msg.Message; await _mailer.SendEmail(x.Address, x.Subject, x.Body); msg.Ack(); } catch (Exception) { msg.Nack(); } }); }