Hangfire background job remain enqueued

Question

I have a MVC application and I am trying to send an email using Hangfire and Postal. The email must be sent after a registration. The registration works properly, but the job I run remain enqueued and I not receive any email. So in my MVC controller I have the following code:

public async Task<ActionResult> Register(RegisterViewModel model)
{
    //register correctly the user

    //I send the email
    BackgroundJob.Enqueue(() => 
        NotifyRegistration(user.Id, user.UserName, user.Email)   
    );

    ...
 }

[AutomaticRetry(Attempts = 5)]
public async Task NotifyRegistration(string userId, string username, string email)
{
    //I calculate callbackUrl

    var viewsPath = Path.GetFullPath(HostingEnvironment.MapPath(@"~/Views/Emails"));
    var engines = new ViewEngineCollection();
    engines.Add(new FileSystemRazorViewEngine(viewsPath));

    var emailService = new EmailService(engines);

    var emailToSend = new NewRegisteredUserEmail
    {
        To = email, UserName = username, CallbackUrl = callbackUrl 
    };

    emailService.Send(emailToSend);
}

I cannot debug the NotifyRegistration method. I don't know why. I am using Postal, so EmailService is not my implementation. Here how I configured the smtp service:

<system.net>
  <mailSettings>
    <smtp deliveryMethod="Network">
      <network host="smtp.live.com" port="25" enableSsl="true" userName="***" password="***"></network>
    </smtp>
  </mailSettings>
</system.net>

If I run the hangfire dashboard I see the jobs enqued

But nothing else happened. What do I miss to send the email?

Thank you

UPDATE In the startup.cs I have written this:

var options = new SqlServerStorageOptions
{
    QueuePollInterval = TimeSpan.FromSeconds(1)
};

GlobalConfiguration.Configuration
     .UseSqlServerStorage("DbConnectionString", options)
     .UseFilter(new LogEmailFailureAttribute());

 app.UseHangfireDashboard();
 app.UseHangfireServer();

UPDATE 2 I transformed my NotifyRegistration in this way:

[AutomaticRetry(Attempts = 5)]
public async Task NotifyRegistration(string userId, string username, string email, EmailService emailService)
{
    //I calculate callbackUrl

    var emailToSend = new NewRegisteredUserEmail
    {
        To = email, UserName = username, CallbackUrl = callbackUrl 
    };

    emailService.Send(emailToSend);
}

Answer 1

I Found the problem(s):

1. The version of sql server was not supported. I was using 2005. Supported database is 2008R2 and later: http://docs.hangfire.io/en/latest/configuration/using-sql-server.html

2. The method NotifyRegistration must be static: https://discuss.hangfire.io/t/jobs-in-enqueue-state-most-never-run/2367/4

.

[AutomaticRetry(Attempts = 5)]
public static void NotifyRegistration(string userId, string username, string email, EmailService emailService)
{
    //I calculate callbackUrl

    var emailToSend = new NewRegisteredUserEmail
    {
        To = email, UserName = username, CallbackUrl = callbackUrl 
    };

    emailService.Send(emailToSend);
}

Answer 2

Without seeing your Hangfire configuration...

Do you have app.UseHangfireServer(); anywhere? That is what tells Hangfire that it needs to do the executing - otherwise you're simply queuing as it expects something else to do the execution.