Azure – Scripts for Dead Letter Queue Notification

There is a trigger called Service bus trigger in Azure Function which will also work for Dead Lettered messages as below:

Here you just need to add queuname/$DeadLetterQueue in Service bus trigger:

using Azure.Messaging.ServiceBus;
using Microsoft.Azure.Functions.Worker;
using Microsoft.Extensions.Logging;

namespace FunctionApp204
{
    public class Function1
    {
        private readonly ILogger<Function1> ri_lg;
        public Function1(ILogger<Function1> logger)
        {
            ri_lg = logger;
        }
        [Function(nameof(Function1))]
        public async Task Run(
            [ServiceBusTrigger("rith/$DeadLetterQueue", Connection = "rith")]
            ServiceBusReceivedMessage message,
            ServiceBusMessageActions messageActions)
        {
            ri_lg.LogInformation("Message ID: {id}", message.MessageId);
            ri_lg.LogInformation("Message Body: {body}", message.Body);
            ri_lg.LogInformation("Message Content-Type: {contentType}", message.ContentType);
            await messageActions.CompleteMessageAsync(message);
        }
    }
}

After Dead lettered the message:

the function gets triggered:

To send email you can use SendGrid/ SMTP .