# Amazon SQS
Amazon SQS includes a DelaySeconds property, which can be used to defer message delivery. MassTransit uses this feature to provide scheduled message delivery.
# Configuration
To configure the Amazon SQS message scheduler, see the example below.
namespace SchedulingAmazonSQS
{
using System;
using MassTransit;
using Microsoft.Extensions.DependencyInjection;
public class Program
{
public static void Main()
{
var services = new ServiceCollection();
services.AddMassTransit(x =>
{
x.AddDelayedMessageScheduler();
x.UsingAmazonSqs((context, cfg) =>
{
cfg.UseDelayedMessageScheduler();
cfg.ConfigureEndpoints(context);
});
});
}
}
}
WARNING
Scheduled messages cannot be canceled when using the Amazon SQS message scheduler